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.
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Function
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Returns
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ASCII(string_exp)
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ASCII code value of the leftmost character of string_exp as an integer.
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BIT_LENGTH(string_exp)
[ODBC 3.0 only]
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The length in bits of the string expression.
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CHAR(code)
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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.
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CHAR_LENGTH(string_exp)
[ODBC 3.0 only]
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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.)
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CHARACTER_LENGTH(string_exp) [ODBC 3.0 only]
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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.)
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CONCAT(string_exp1, string_exp2)
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The string resulting from concatenating string_exp2 and string_exp1. The string is system dependent.
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DIFFERENCE(string_exp1, string_exp2)
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An integer value that indicates the difference between the values returned by the SOUNDEX function for string_exp1 and string_exp2.
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INSERT(string_exp1, start, length, string_exp2)
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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.
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LCASE(string_exp)
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Uppercase characters in string_exp converted to lowercase.
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LEFT(string_exp,count)
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The count of characters of string_exp.
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LENGTH(string_exp)
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The number of characters in string_exp, excluding trailing blanks and the string termination character.
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LOCATE(string_exp1, string_exp2[,start])
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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.
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LTRIM(string_exp)
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The characters of string_exp with leading blanks removed.
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OCTET_LENGTH(string_exp)
[ODBC 3.0 only]
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The length in bytes of the string expression. The result is the smallest integer not less than the number of bits divided by 8.
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POSITION(character_exp IN character_exp)
[ODBC 3.0 only]
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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.
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REPEAT(string_exp, count)
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A string composed of string_exp repeated count times.
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REPLACE(string_exp1, string_exp2, string_exp3)
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Replaces all occurrences of string_exp2 in string_exp1 with string_exp3.
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RIGHT(string_exp, count)
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The rightmost count of characters in string_exp.
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RTRIM(string_exp)
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The characters of string_exp with trailing blanks removed.
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SOUNDEX(string_exp)
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A data source dependent string representing the sound of the words in string_exp.
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SPACE(count)
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A string consisting of count spaces.
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SUBSTRING(string_exp, start, length)
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A string derived from string_exp beginning at the character position start for length characters.
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UCASE(string_exp)
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Lowercase characters in string_exp converted to uppercase.
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