July 2002
Beginner
424 pages
9h 30m
English
Content preview from SQL: Visual QuickStart Guide
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Finding the Length of a String with CHARACTER_LENGTH()
Use the CHARACTER_LENGTH() function to return the number of characters in a string. The CHARACTER_LENGTH() function’s important characteristics are:
CHARACTER_LENGTH() returns an integer greater than or equal to zero.
CHARACTER_LENGTH() counts characters, not bytes. A multibyte or Unicode character represents one character. (To count bytes, see the Tips in this section.)
The length of an empty string is zero.
If its argument is null, CHARACTER_LENGTH() returns null. (But see the Oracle exception in the DBMS Tip in this section.)
To find the length of a string:
- Type:
string is a string expression such as a column that contains character strings, a string literal, ...
CHARACTER_LENGTH(string)
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