Thursday, July 3, 2008

Function Oracle convert

Description Oracle MS SQL Server
Smallest integer >= n CEIL CEILING
Modulus MOD %
Truncate number TRUNC
Max or min number or string in list GREATEST,
LEAST

Translate NULL to n NVL ISNULL
Return NULL if two values are equal DECODE NULLIF
String concatenation CONCAT(str1,str2) str1 + str2
Convert ASCII to char CHR CHAR
Capitalize first letters of words INITCAP
Find string in string INSTR CHARINDEX
Find pattern in string INSTR PATINDEX
String length LENGTH DATALENGTH
Pad string with blanks LPAD,
RPAD

Trim leading or trailing chars other than blanks LTRIM(str,chars),
RTRIM(str,chars)

Replace chars in string REPLACE STUFF
Convert number to string TO_CHAR STR, CAST
Convert string to number TO_NUMBER CAST
Get substring from string SUBSTR SUBSTRING
Char for char translation in string TRANSLATE
Date addition ADD_MONTH or + DATEADD
Date subtraction MONTHS_BETWEEN or - DATEDIFF
Last day of month LAST_DAY
Time zone conversion NEW_TIME
Next specified weekday after date NEXT_DAY
Convert date to string TO_CHAR DATENAME, CONVERT
Convert string to date TO_DATE CAST
Convert date to number TO_NUMBER(TO_CHAR(d)) DATEPART
Date round ROUND CONVERT
Date truncate TRUNC CONVERT
Current date SYSDATE GETDATE
Convert hex to binary HEXTORAW CAST
Convert binary to hex RAWTOHEX CONVERT
If statement in an expression DECODE CASE ... WHEN
or COALESCE
User's login id number or name UID, USER SUSER_ID, SUSER_NAME
User's database id number or name UID, USER USER_ID, USR_NAME
Current user USER USER

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