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CHAR_LENGTH Function
The CHAR_LENGTH function returns the number of characters in a string. You can also use
CHARACTER_LENGTH.
CHAR[ACTER]_LENGTH (string-value-expression)
string-value-expression
specifies the string value expression for which to return the length in characters. Neoview
SQL returns the result as a two-byte signed integer with a scale of zero. If
string-value-expression is null, Neoview SQL returns a length of null. See
Value Expressions" (page
Considerations for CHAR_LENGTH
CHAR and VARCHAR Operands
For a column declared as fixed CHAR, Neoview SQL returns the maximum length of that column.
For a VARCHAR column, Neoview SQL returns the actual length of the string stored in that
column.
Examples of CHAR_LENGTH
•
This function returns 12 as the result. The concatenation operator is denoted by two vertical
bars (||).
CHAR_LENGTH ('ROBERT' || ' ' || 'SMITH')
•
The string '' is the null (or empty) string. This function returns 0 (zero):
CHAR_LENGTH ('')
•
The DEPTNAME column has data type CHAR(12). Therefore, this function always returns
12:
CHAR_LENGTH (deptname)
•
The PROJDESC column in the PROJECT table has data type VARCHAR(18). This function
returns the actual length of the column value—not 18 for shorter strings—because it is a
VARCHAR value:
SELECT CHAR_LENGTH (projdesc)
FROM persnl.project;
(EXPR)
----------
--- 6 row(s) selected.
302
SQL Functions and Expressions
208).
14
13
13
17
9
9
"Character
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