# Functions - [Aggregate](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate.md): This section describes how to use AGGREGATE functions in Lenses SQL. - [AVG](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/avg.md): This page describes the AVG function in Lenses SQL. - [BOTTOMK](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/bottomk.md): This page describes the BOTTOMK function in Lenses SQL. - [COLLECT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/collect.md): This page describe the COLLECT function in Lenses SQL. - [COLLECT\_UNIQUE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/collect_unique.md): This page describes the COLLECT\_UNIQUE function in Lenses SQL. - [COUNT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/count.md): This page describes the COUNT function in Lenses SQL. - [FIRST](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/first.md): This page describes the FIRST function in Lenses SQL. - [LAST](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/last.md): This page describes the LAST function in Lenses SQL. - [MAXK](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/maxk.md): This page describes the MAXK function in Lenses SQL. - [MAXK\_UNIQUE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/maxk_unique.md): This page describes the MAXK\_UNIQUE function in Lenses SQL. - [MINK](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/mink.md): This page describes the MINK function in Lenses SQL. - [MINK\_UNIQUE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/mink_unique.md): This page describes the MINK\_UNIQUE function in Lenses SQL. - [SUM](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/sum.md): This page describes the SUM function in Lenses SQL. - [TOPK](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/aggregate/topk.md): This page describes the TOPK function in Lenses SQL. - [Array](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array.md): This page describes how to use ARRAY functions in Lenses SQL Processors. - [ELEMENT\_OF](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/element_of.md): This page describes the ELEMENT\_OF function in Lenses SQL. - [FLATTEN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/flatten.md): This page describes the FLATTEN function in Lenses SQL. - [IN\_ARRAY](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/in_array.md): This page describes the IN\_ARRAY function in Lenses SQL. - [REPEAT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/repeat.md): This page describes the REPEAT function in Lenses SQL. - [SIZEOF](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/sizeof.md): This page describes the SIZEOF function in Lenses SQL. - [ZIP\_ALL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/zip_all.md): This page describes the ZIP\_ALL function in Lenses SQL. - [ZIP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/array/zip.md): This page describes the ZIP function in Lenses SQL. - [Conditions](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/conditions.md): This page describes how to use Conditions in Lenses SQL Processors. - [Conversion](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/conversion.md): This page describes how to use conversion or CAST functions in Lenses SQL Processors. - [Date & Time](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time.md): This page describes how to use date and time functions in Lenses SQL Processors. - [CONVERT\_DATETIME](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/convert_datetime.md): This page describes the CONVERT\_DATETIME function in Lenses SQL. - [DATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/date.md): This page describes the DATE function in Lenses SQL. - [DATETIME](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/datetime.md): This page describes the DATETIME function in Lenses SQL. - [EXTRACT\_TIME](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/extract_time.md): This page describes the EXTRACT\_TIME function in Lenses SQL. - [EXTRACT\_DATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/extract_date.md): This page describes the EXTRACT\_DATE function in Lenses SQL. - [FORMAT\_DATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/format_date.md): This page describes the FORMAT\_DATE function in Lenses SQL. - [FORMAT\_TIME](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/format_time.md): This page describes the FORMAT\_TIME function in Lenses SQL. - [FORMAT\_TIMESTAMP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/format_timestamp.md): This page describes the FORMAT\_TIMESTAMP function in Lenses SQL. - [HOUR](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/hour.md): This page describes the HOUR function in Lenses SQL. - [MONTH\_TEXT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/month_text.md): This page describes the MONTH\_TEXT function in Lenses SQL. - [MINUTE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/minute.md): This page describes the MINUTE function in Lenses SQL. - [MONTH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/month.md): This page describes the MONTH function in Lenses SQL. - [PARSE\_DATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/parse_date.md): This page describes the PARSE\_DATE function in Lenses SQL. - [PARSE\_TIME\_MILLIS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/parse_time_millis.md): This page describes the PARSE\_TIME\_MILLIS function in Lenses SQL. - [PARSE\_TIME\_MICROS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/parse_time_micros.md): This page describes the PARSE\_TIME\_MICROS function in Lenses SQL. - [PARSE\_TIMESTAMP\_MILLIS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/parse_timestamp_millis.md): This page describes the PARSE\_TIMESTAMP\_MILLIS function in Lenses SQL. - [PARSE\_TIMESTAMP\_MICROS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/parse_timestamp_micros.md): This page describes the PARSE\_TIMESTAMP\_MICROS function in Lenses SQL. - [SECOND](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/second.md): This page describes the SECOND function in Lenses SQL. - [TIMESTAMP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/timestamp.md): This page describes the TIMESTAMP function in Lenses SQL. - [TIME\_MICROS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/time_micros.md): This page describes the TIME\_MICROS function in Lenses SQL. - [TIMESTAMP\_MICROS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/timestamp_micros.md): This page describes the TIMESTAMP\_MICROS function in Lenses SQL. - [TIME\_MILLIS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/time_millis.md): This page describes the TIME\_MILLIS function in Lenses SQL. - [TIMESTAMP\_MILLIS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/timestamp_millis.md): This page describes the TIMESTAMP\_MILLIS function in Lenses SQL. - [TO\_DATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/to_date.md): This page describes the TO\_DATE function in Lenses SQL. - [TO\_DATETIME](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/to_datetime.md): This page describes the TO\_DATETIME function in Lenses SQL. - [TOMORROW](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/tomorrow.md): This page describes the TOMORROW function in Lenses SQL. - [TO\_TIMESTAMP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/to_timestamp.md): This page describes the TO\_TIMESTAMP function in Lenses SQL. - [YEAR](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/year.md): This page describes the YEAR function in Lenses SQL. - [YESTERDAY](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/date-and-time/yesterday.md): This page describes the YESTERDAY function in Lenses SQL. - [Headers](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers.md): This page describes how to use HEADER functions in Lenses SQL Processors. - [HEADERASSTRING](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headerasstring.md): This page describes the HEADERASSTRING function in Lenses SQL. - [HEADERASINT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headerasint.md): This page describes the HEADERASINT function in Lenses SQL. - [HEADERASLONG](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headeraslong.md): This page describes the HEADERASLONG function in Lenses SQL. - [HEADERASDOUBLE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headerasdouble.md): This page describes the HEADERASDOUBLE function in Lenses SQL. - [HEADERASFLOAT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headerasfloat.md): This page describes the HEADERASFLOAT function in Lenses SQL. - [HEADERKEYS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/headers/headerkeys.md): This page describes the HEADERKEYS function in Lenses SQL. - [JSON](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/json.md): This page describes the JSON functions in Lenses SQL. - [JSON\_EXTRACT\_FIRST](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/json/json_extract_first.md): This page describes the JSON\_EXTRACT\_FIRST function in Lenses SQL. - [JSON\_EXTRACT\_ALL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/json/json_extract_all.md): This page describes the JSON\_EXTRACT\_ALL function in Lenses SQL. - [Numeric](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric.md): This page describes how to use numeric functions in Lenses SQL Processors. - [ABS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/abs.md): This page describes the ABS function in Lenses SQL. - [ACOS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/acos.md): This page describes the ACOS function in Lenses SQL. - [ASIN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/asin.md): This page describes the ASIN function in Lenses SQL. - [ATAN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/atan.md): This page describes the ATAN function in Lenses SQL. - [CBRT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/cbrt.md): This page describes the CBRT function in Lenses SQL. - [CEIL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/ceil.md): This page describes the CEIL function in Lenses SQL. - [COSH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/cosh.md): This page describes the COSH function in Lenses SQL. - [COS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/cos.md): This page describes the COS function in Lenses SQL. - [DEGREES](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/degrees.md): This page describes the DEGRESS function in Lenses SQL. - [DISTANCE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/distance.md): This page describes the DISTANCE function in Lenses SQL. - [FLOOR](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/floor.md): This page describes the FLOOR function in Lenses SQL. - [MAX](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/max.md): This page describes the MAX function in Lenses SQL. - [MIN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/min.md): This page describes the MIN function in Lenses SQL. - [MOD](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/mod.md): This page describes the MOD function in Lenses SQL. - [NEG](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/neg.md): This page describes the NEG function in Lenses SQL. - [POW](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/pow.md): This page describes the POW function in Lenses SQL. - [RADIANS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/radians.md): This page describes the RADIANS function in Lenses SQL. - [RANDINT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/randint.md): This page describes the RANDINT function in Lenses SQL. - [ROUND](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/round.md): This page describes the ROUND function in Lenses SQL. - [SIGN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/sign.md): This page describes the SIGN function in Lenses SQL. - [SINH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/sinh.md): This page describes the SINH function in Lenses SQL. - [SIN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/sin.md): This page describes the SIN function in Lenses SQL. - [SQRT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/sqrt.md): This page describes the SQRT function in Lenses SQL. - [TANH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/tanh.md): This page describes the TANH function in Lenses SQL. - [TAN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/numeric/tan.md): This page describes the TAN function in Lenses SQL. - [Nulls](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls.md): This page describes how to use NULL functions in Lenses SQL Processors. - [ISNULL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls/isnull.md): This page describes the ISNULL function in Lenses SQL. - [ISNOTNULL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls/isnotnull.md): This page describes the ISNOTNULL function in Lenses SQL. - [COALESCE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls/coalesce.md): This page describes the COALESCE function in Lenses SQL. - [AS\_NULLABLE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls/as_nullable.md): This page describes the AS\_NULLABLE function in Lenses SQL. - [AS\_NON\_NULLABLE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/nulls/as_non_nullable.md): This page describes the AS\_NON\_NULLABLE function in Lenses SQL. - [Obfuscation](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation.md): This page describes how to use obfuscation functions in Lenses SQL Processors. - [ANONYMIZE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/anonymize.md): This page describes the ANONYMIZE function in Lenses SQL. - [MASK](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/mask.md): This page describes the MASK function in Lenses SQL. - [EMAIL](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/email.md): This page describes the EMAIL function in Lenses SQL. - [FIRST1](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/first1.md): This page describe the FIRST1 function in Lenses SQL. - [FIRST2](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/first2.md): This page describes the FIRST2 function in Lenses SQL. - [FIRST3](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/first3.md): This page describes the FIRST3 function in Lenses SQL. - [FIRST4](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/first4.md): This page describes the FIRST4 function in Lenses SQL. - [LAST1](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/last1.md): This page describes the LAST1 function in Lenses SQL. - [LAST2](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/last2.md): This page describes the LAST2 function in Lenses SQL. - [LAST3](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/last3.md): This page describes the LAST3 function in Lenses SQL. - [LAST4](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/last4.md): This page describes the LAST4 function in Lenses SQL. - [INITIALS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/obfuscation/initials.md): This page describes the INITALS function in Lenses SQL. - [Offsets](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/offsets.md): This page describes how to use offset functions in Lenses SQL Processors. - [Schema](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/schema.md): This page describes how to use schema functions in Lenses SQL Processors. - [TYPEOF](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/schema/typeof.md): This page describes the TYPEOF function in Lenses SQL. - [DUMP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/schema/dump.md): This page describes the DUMP function in Lenses SQL. - [String](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string.md): This page describes how to use string functions in Lenses SQL Processors. - [ABBREVIATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/abbreviate.md): This page describes the ABBREVIATE function in Lenses SQL. - [BASE64](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/base64.md): This page describes the BASE64function in Lenses SQL. - [CAPITALIZE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/capitalize.md): This page describes the CAPITALIZE function in Lenses SQL. - [CENTER](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/center.md): This page describes the CENTER function in Lenses SQL. - [CHOP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/chop.md): This page describes the CHOP function in Lenses SQL. - [CONCAT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/concat.md): This page describes the CONCAT function in Lenses SQL. - [CONTAINS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/contains.md): This page describes the CONTAINS function in Lenses SQL. - [DECODE64](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/decode64.md): This page describes the DECODE64 function in Lenses SQL. - [DELETEWHITESPACE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/deletewhitespace.md): This page describes the DELETEWHITESPACE function in Lenses SQL. - [DIGITS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/digits.md): This page describes the DIGITS function in Lenses SQL. - [DROPLEFT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/dropleft.md): This page describes the DROPLEFT function in Lenses SQL. - [DROPRIGHT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/dropright.md): This page describes the DROPRIGHT function in Lenses SQL. - [ENDSWITH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/endswith.md): This page describes the ENDSWITH function in Lenses SQL. - [INDEXOF](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/indexof.md): This page describes the INDEXOF function in Lenses SQL. - [LEN](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/len.md): This page describes the LEN function in Lenses SQL. - [LOWER](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/lower.md): This page describes the LOWER function in Lenses SQL. - [LPAD](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/lpad.md): This page describes the LPAD function in Lenses SQL. - [MKSTRING](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/mkstring.md): This page describes the MKSTRING function in Lenses SQL. - [REGEXP](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/regexp.md): This page describes the REGEXP function in Lenses SQL. - [REGEX\_MATCHES](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/regex_matches.md): This page describes the REGEX\_MATCHES function in Lenses SQL. - [REPLACE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/replace.md): This page describes the REPLACE function in Lenses SQL. - [REVERSE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/reverse.md): This page describes the REVERSE function in Lenses SQL. - [RPAD](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/rpad.md): This page describes the REGEX\_MATCHES function in Lenses SQL. - [STARTSWITH](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/startswith.md): This page describes the STARTSWITH function in Lenses SQL. - [STRIPACCENTS](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/stripaccents.md): This page describes the STRIPACCENTS function in Lenses SQL. - [SUBSTR](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/substr.md): This page describes the SUBSTR function in Lenses SQL. - [SWAPCASE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/swapcase.md): This page describes the SWAPCASE function in Lenses SQL. - [TAKELEFT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/takeleft.md): This page describes the TAKELEFT function in Lenses SQL. - [TAKERIGHT](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/takeright.md): This page describes the TAKERIGHT function in Lenses SQL. - [TRIM](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/trim.md): This page describes the TRIM function in Lenses SQL. - [TRUNCATE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/truncate.md): This page describes the TRUNCATE function in Lenses SQL. - [UNCAPITALIZE](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/uncapitalize.md): This page describes the UNCAPITALIZE function in Lenses SQL. - [UPPER](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/upper.md): This page describes the UPPER function in Lenses SQL. - [UUID](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/string/uuid.md): This page describes the UUID function in Lenses SQL. - [User Defined Functions](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/user-defined-functions.md): This page describes how to write UDFs for Lenses SQL. - [User Defined Aggregate Functions](https://docs.lenses.io/latest/user-guide/using/sql-reference/functions/user-defined-aggregate-functions.md): This page describes how to use User defined functions in Lenses SQL Processors. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.lenses.io/latest/user-guide/using/sql-reference/functions.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.