string_exp can be the name of a column, a string literal, or the result of another scalar function, where the underlying data type is SQL_CHAR, SQL_VARCHAR, or SQL_LONGVARCHAR.start, length, and count can be the result of another scalar function or a literal numeric value, where the underlying data type is SQL_TINYINT, SQL_SMALLINT, or SQL_INTEGER.Function | Returns |
ASCII(string_exp) | ASCII code value of the leftmost character of string_exp as an integer. |
BIT_LENGTH(string_exp) [ODBC 3.0 only] | The length in bits of the string expression. |
CHAR(code) | The character with the ASCII code value specified by code. code should be between 0 and 255; otherwise, the return value is data-source dependent. |
CHAR_LENGTH(string_exp) [ODBC 3.0 only] | The length in characters of the string expression, if the string expression is of a character data type; otherwise, the length in bytes of the string expression (the smallest integer not less than the number of bits divided by 8). (This function is the same as the CHARACTER_LENGTH function.) |
CHARACTER_LENGTH(string_exp) [ODBC 3.0 only] | The length in characters of the string expression, if the string expression is of a character data type; otherwise, the length in bytes of the string expression (the smallest integer not less than the number of bits divided by 8). (This function is the same as the CHAR_LENGTH function.) |
CONCAT(string_exp1, string_exp2) | The string resulting from concatenating string_exp2 and string_exp1. The string is system dependent. |
DIFFERENCE(string_exp1, string_exp2) | An integer value that indicates the difference between the values returned by the SOUNDEX function for string_exp1 and string_exp2. |
INSERT(string_exp1, start, length, string_exp2) | A string where length characters have been deleted from string_exp1 beginning at start and where string_exp2 has been inserted into string_exp beginning at start. |
LCASE(string_exp) | Uppercase characters in string_exp converted to lowercase. |
LEFT(string_exp,count) | The count of characters of string_exp. |
LENGTH(string_exp) | The number of characters in string_exp, excluding trailing blanks and the string termination character. |
LOCATE(string_exp1, string_exp2[,start]) | The starting position of the first occurrence of string_exp1 within string_exp2. If start is not specified, the search begins with the first character position in string_exp2. If start is specified, the search begins with the character position indicated by the value of start. The first character position in string_exp2 is indicated by the value 1. If string_exp1 is not found, 0 is returned. |
LTRIM(string_exp) | The characters of string_exp with leading blanks removed. |
OCTET_LENGTH(string_exp) [ODBC 3.0 only] | The length in bytes of the string expression. The result is the smallest integer not less than the number of bits divided by 8. |
POSITION(character_exp IN character_exp) [ODBC 3.0 only] | The position of the first character expression in the second character expression. The result is an exact numeric with an implementation-defined precision and a scale of 0. |
REPEAT(string_exp, count) | A string composed of string_exp repeated count times. |
REPLACE(string_exp1, string_exp2, string_exp3) | Replaces all occurrences of string_exp2 in string_exp1 with string_exp3. |
RIGHT(string_exp, count) | The rightmost count of characters in string_exp. |
RTRIM(string_exp) | The characters of string_exp with trailing blanks removed. |
SOUNDEX(string_exp) | A data source dependent string representing the sound of the words in string_exp. |
SPACE(count) | A string consisting of count spaces. |
SUBSTRING(string_exp, start, length) | A string derived from string_exp beginning at the character position start for length characters. |
UCASE(string_exp) | Lowercase characters in string_exp converted to uppercase. |