Syntax
to_char_char::=
[画像:Description of to_char_char.gif follows]Purpose
TO_CHAR (character) converts NCHAR, NVARCHAR2, CLOB, or NCLOB data to the database character set. The value returned is always VARCHAR2.
When you use this function to convert a character LOB into the database character set, if the LOB value to be converted is larger than the target type, then the database returns an error.
Examples
The following example interprets a simple string as character data:
SELECT TO_CHAR('01110') FROM DUAL;
TO_CH
-----
01110
Compare this example with the first example for TO_CHAR (number).
The following example converts some CLOB data from the pm.print_media table to the database character set:
SELECT TO_CHAR(ad_sourcetext) FROM print_media WHERE product_id = 2268; TO_CHAR(AD_SOURCETEXT) -------------------------------------------------------------------- ****************************** TIGER2 2268...Standard Hayes Compatible Modem Product ID: 2268 The #1 selling modem in the universe! Tiger2's modem includes call management and Internet voicing. Make real-time full duplex phone calls at the same time you're online. **********************************
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