This topic compares functions built in MaxCompute, MySQL, and Oracle.
| Function type | MaxCompute | HIVE | MySQL | Oracle | Partition pruning supported in MaxCompute SQL |
| Date functions | DATEDIFF | DATEDIFF | DATEDIFF | MONTHS_BETWEEN |
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| DATE_ADD | DATE_ADD | DATE_ADD | N/A |
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| DATEPART | N/A | DATE_FORMAT | EXTRACT (datetime) |
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| DATETRUNC | TRUNC | DATE_FORMAT | EXTRACT (datetime) |
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| FROM_UNIXTIME | FROM_UNIXTIME | FROM_UNIXTIME | N/A |
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| GETDATE | CURRENT_DATE | NOW | CURRENT_DATE |
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| ISDATE | N/A | STR_TO_DATE (If false is returned, the string cannot be converted to DATE.) | N/A |
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| LASTDAY | LAST_DAY | LAST_DAY | LAST_DAY |
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| TO_DATE | TO_DATE | STR_TO_DATE() | DATE |
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| TO_CHAR | N/A | DATE_FORMAT | TO_CHAR (datetime) |
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| UNIX_TIMESTAMP | UNIX_TIMESTAMP | UNIX_TIMESTAMP | N/A |
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| WEEKDAY | N/A | WEEKDAY | N/A |
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| WEEKOFYEAR | WEEKOFYEAR | WEEKOFYEAR | N/A |
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| YEAR | YEAR | YEAR | YEAR |
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| QUARTER | QUARTER | QUARTER | QUARTER |
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| MONTH | MONTH | MONTH | MONTH |
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| DAY | DAY | DAY | DAY |
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| DAYOFMONTH | DAYOFMONTH | DAYOFMONTH | N/A |
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| HOUR | HOUR | HOUR | HOUR |
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| MINUTE | MINUTE | MINUTE | MINUTE |
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| CURRENT_TIMESTAMP | CURRENT_TIMESTAMP | CURRENT_TIMESTAMP | CURRENT_TIMESTAMP |
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| ADD_MONTHS | ADD_MONTHS | ADDDATE | ADD_MONTHS |
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| LAST_DAY | LAST_DAY | LAST_DAY | N/A |
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| NEXT_DAY | NEXT_DAY | N/A | NEXT_DAY |
|
|
| MONTHS_BETWEEN | MONTHS_BETWEEN | timestampdiff | MONTHS_BETWEEN |
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| Mathematical functions | ABS | ABS | ABS | ABS |
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| ACOS | ACOS | ACOS | ACOS |
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| ASIN | ASIN | ASIN | ASIN |
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| ATAN | ATAN | ATAN | ATAN |
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| CEIL | CEIL | CEIL | CEIL |
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| CONV | CONV | CONV | N/A |
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| COS | COS | COS | COS |
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| COSH | COSH | N/A | COSH |
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| COT | COT | COT | COT |
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| EXP | EXP | EXP | EXP |
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| FLOOR | FLOOR | FLOOR | FLOOR |
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| LN | LN | LN | LN |
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| LOG | LOG | LOG | LOG |
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| POW | POW | POW | POWER |
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| RAND | RAND | RAND | N/A |
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| ROUND | ROUND | ROUND | ROUND |
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| SIN | SIN | SIN | SIN |
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| SINH | SINH | N/A | SINH |
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| SQRT | SQRT | SQRT | SQRT |
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| TAN | TAN | TAN | TAN |
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| TANH | TANH | N/A | TANH |
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| TRUNC | TRUNC | TRUNCATE | TRUNC |
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| LOG2 | LOG2 | LOG2 | LOG |
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| LOG10 | LOG10 | LOG10 | LOG |
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| BIN | BIN | BIN | BITAND |
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| HEX | HEX | HEX | RAWTOHEX |
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| UNHEX | UNHEX | UNHEX | HEXTORAW |
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| RADIANS | RADIANS | RADIANS | RADIANS |
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| DEGREES | DEGREES | DEGREES | DEGREES |
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| SIGN | SIGN | SIGN | SIGN |
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| E | E | N/A | N/A |
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| PI | PI | PI | PI |
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| FACTORIAL | FACTORIAL | N/A | N/A |
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| CBRT | CBRT | N/A | N/A |
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| SHIFTLEFT | SHIFTLEFT | << | N/A |
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| SHIFTRIGHT | SHIFTRIGHT | >> | N/A |
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| SHIFTRIGHTUNSIGNED | SHIFTRIGHTUNSIGNED | >>> | N/A |
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| Window functions | DENSE_RANK | DENSE_RANK | DENSE_RANK | DENSE_RANK |
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| RANK | RANK | RANK | RANK |
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| LAG | LAG | LAG | LAG |
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| LEAD | LEAD | LEAD | LEAD |
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| PERCENT_RANK | PERCENT_RANK | PERCENT_RANK | PERCENT_RANK |
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| ROW_NUMBER | ROW_NUMBER | ROW_NUMBER | ROW_NUMBER |
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| CLUSTER_SAMPLE | N/A | N/A | N/A |
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| NTILE | NTILE | NTILE | NTILE |
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| Aggregate functions | COUNT | COUNT | COUNT | COUNT |
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| AVG | AVG | AVG | AVG |
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| MAX | MAX | MAX | MAX |
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| MIN | MIN | MIN | MIN |
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| MEDIAN | N/A | N/A | MEDIAN |
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| STDDEV | STDDEV | STDDEV | STDDEV |
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| STDDEV_SAMP | STDDEV_SAMP | STDDEV_SAMP | STDDEV_SAMP |
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| SUM | SUM | SUM | SUM |
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| WM_CONCAT | N/A | GROUP_CONCAT | WM_CONCAT |
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| COLLECT_LIST | COLLECT LIST | N/A | COLLECT |
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| COLLECT_SET | COLLECT SET | N/A | COLLECT |
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| VARIANCE/VAR_POP | VARIANCE/VAR_POP | VAR_POP | VARIANCE/VAR_POP |
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| VAR_SAMP | VAR_SAMP | VAR_SAMP | VAR_SAMP |
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| COVAR_POP | COVAR_POP | N/A | COVAR_POP |
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| COVAR_SAMP | COVAR_SAMP | N/A | COVAR_SAMP |
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| PERCENTILE | PERCENTILE | N/A | N/A |
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| String functions | CHAR_MATCHCOUNT | N/A | N/A | N/A |
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| CHR | CHR | CHAR | CHR |
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| CONCAT | CONCAT | CONCAT | CONCAT |
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| GET_JSON_OBJECT | GET_JSON_OBJECT | JSON_EXTRACT() | N/A |
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| INSTR | INSTR | INSTR | INSTR |
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| IS_ENCODING | N/A | N/A | N/A |
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| KEYVALUE | N/A | N/A | N/A |
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| LENGTH | LENGTH | LENGTH | LENGTH |
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| LENGTHB | LENGTHB | LENGTHB | LENGTHB |
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| MD5 | MD5 | MD5 | N/A |
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| REGEXP_EXTRACT | REGEXP_EXTRACT | N/A | N/A |
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| REGEXP_INSTR | N/A | REGEXP_INSTR | REGEXP_INSTR |
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| REGEXP_REPLACE | REGEXP_REPLACE | REGEXP_REPLACE | REGEXP_REPLACE |
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| REGEXP_SUBSTR | N/A | REGEXP_SUBSTR | REGEXP_SUBSTR |
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| REGEXP_COUNT | N/A | N/A | REGEXP_COUNT |
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| SPLIT_PART | N/A | N/A | N/A |
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| SUBSTR | SUBSTR | SUBSTR | SUBSTR |
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| SUBSTRING | SUBSTRING | SUBSTRING | SUBSTR |
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| TOLOWER | LOWER | LOWER | LOWER |
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| TOUPPER | UPPER | UPPER | UPPER |
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| TRIM | TRIM | TRIM | TRIM |
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| LTRIM | LTRIM | LTRIM | LTRIM |
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| RTRIM | RTRIM | RTRIM | LTRIM |
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| REVERSE | REVERSE | REVERSE | REVERSE |
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| SPACE | SPACE | SPACE | SPACE |
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| REPEAT | REPEAT | REPEAT | REPEAT |
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| ASCII | ASCII | ASCII | ASCII |
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| CONCAT_WS | CONCAT_WS | CONCAT_WS | N/A |
|
|
| LPAD | LPAD | LPAD | LPAD |
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| RPAD | RPAD | RPAD | RPAD |
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| REPLACE | N/A | REPLACE | REPLACE |
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| SOUNDEX | SOUNDEX | SOUNDEX | SOUNDEX |
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| SUBSTRING_INDEX | SUBSTRING_INDEX | SUBSTRING_INDEX | N/A |
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| TRANSLATE | TRANSLATE | N/A | TRANSLATE |
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| URL_DECODE | N/A | N/A | N/A |
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| URL_ENCODE | N/A | N/A | PERCENTILE_CONT |
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| CRC32 | CRC32 | CRC32 | N/A |
|
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| Other functions | CAST | CAST | CAST | CAST |
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| COALESCE | COALESCE | COALESCE | COALESCE |
|
|
| DECODE | DECODE | N/A | DECODE |
|
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| GET_IDCARD_AGE | N/A | N/A | N/A |
|
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| GET_IDCARD_BIRTHDAY | N/A | N/A | N/A |
|
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| GET_IDCARD_SEX | N/A | N/A | N/A |
|
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| GREATEST | GREATEST | GREATEST | N/A |
|
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| ORDINAL | N/A | N/A | N/A |
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| LEAST | LEAST | LEAST | LEAST |
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| MAX_PT | N/A | N/A | N/A |
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| UUID | N/A | UUID | UID |
|
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| SAMPLE | N/A | N/A | N/A |
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| IF | IF | IF | IF |
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| CASE WHEN | CASE WHEN | CASE WHEN | CASE WHEN |
|
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| SPLIT | SPLIT | SPLIT | N/A |
|
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| STR_TO_MAP | STR_TO_MAP | N/A | N/A |
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| EXPLODE | EXPLODE | N/A | N/A |
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| MAP | MAP | N/A | N/A |
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| MAP_KEYS | MAP_KEYS | N/A | N/A |
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| MAP_VALUES | MAP_VALUES | N/A | N/A |
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| NVL | NVL | IFNULL | N/A |
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| ARRAY | ARRAY | N/A | N/A |
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| SIZE | SIZE | N/A | N/A |
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| ARRAY_CONTAINS | ARRAY_CONTAINS | N/A | N/A |
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| POSEXPLODE | POSEXPLODE | N/A | N/A |
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| TRANS_ARRAY | N/A | N/A | N/A |
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| INLINE | INLINE | N/A | N/A |
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| NAMED_STRUCT | N/A | N/A | N/A |
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Note The MaxCompute mode is enabled by default. To use the Hive-compatible mode, run the following commands:
-- Switch to the Hive-compatible mode at the project level.
setproject odps.sql.hive.compatible=True;
-- Switch to the Hive-compatible mode at the session level.
set odps.sql.hive.compatible=True;