SQL Server String Functions:
SQL Server string functions are scalar functions that perform an operation on a string input value and return a string or numeric value. All built-in string functions, except for CHARINDEX and PATINDEX, are deterministic. This means they return the same value any time they are called with a specific set of input values.
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SQL Server string functions are scalar functions that perform an operation on a string input value and return a string or numeric value. All built-in string functions, except for CHARINDEX and PATINDEX, are deterministic. This means they return the same value any time they are called with a specific set of input values.
| Functions | Description |
|---|---|
| ASCII() | Returns numeric value of left-most character |
| BIN() | Returns a string representation of the argument |
| BIT_LENGTH() | Returns length of argument in bits |
| CHAR_LENGTH() | Returns number of characters in argument |
| CHAR() | Returns the character for each integer passed |
| CHARACTER_LENGTH() | A synonym for CHAR_LENGTH() |
| CONCAT_WS() | Returns concatenate with separator |
| CONCAT() | Returns concatenated string |
| CONV() | Converts numbers between different number bases |
| ELT() | Returns string at index number |
| EXPORT_SET() | Returns a string such that for every bit set in the value bits, you get an on string and for every unset bit, you get an off string |
| FIELD() | Returns the index (position) of the first argument in the subsequent arguments |
| FIND_IN_SET() | Returns the index position of the first argument within the second argument |
| FORMAT() | Returns a number formatted to specified number of decimal places |
| HEX() | Returns a string representation of a hex value |
| INSERT() | Inserts a substring at the specified position up to the specified number of characters |
| INSTR() | Returns the index of the first occurrence of substring |
| LCASE() | Synonym for LOWER() |
| LEFT() | Returns the leftmost number of characters as specified |
| LENGTH() | Returns the length of a string in bytes |
| LOAD_FILE() | Loads the named file |
| LOCATE() | Returns the position of the first occurrence of substring |
| LOWER() | Returns the argument in lowercase |
| LPAD() | Returns the string argument, left-padded with the specified string |
| LTRIM() | Removes leading spaces |
| MAKE_SET() | Returns a set of comma-separated strings that have the corresponding bit in bits set |
| MID() | Returns a substring starting from the specified position |
| OCT() | Returns a string representation of the octal argument |
| OCTET_LENGTH() | A synonym for LENGTH() |
| ORD() | If the leftmost character of the argument is a multi-byte character, returns the code for that character |
| POSITION() | A synonym for LOCATE() |
| QUOTE() | Escapes the argument for use in an SQL statement |
| REGEXP | Pattern matching using regular expressions |
| REPEAT() | Repeats a string the specified number of times |
| REPLACE() | Replaces occurrences of a specified string |
| REVERSE() | Reverses the characters in a string |
| RIGHT() | Returns the specified rightmost number of characters |
| RPAD() | Appends string the specified number of times |
| RTRIM() | Removes trailing spaces |
| SOUNDEX() | Returns a soundex string |
| SOUNDS LIKE | Compares sounds |
| SPACE() | Returns a string of the specified number of spaces |
| STRCMP() | Compares two strings |
| SUBSTRING_INDEX() | Returns a substring from a string before the specified number of occurrences of the delimiter |
| SUBSTRING(), SUBSTR() | Returns the substring as specified |
| TRIM() | Removes leading and trailing spaces |
| UCASE() | Synonym for UPPER() |
| UNHEX() | Converts each pair of hexadecimal digits to a character |
| UPPER() | Converts to uppercase |