TRANSLATE ... USING

Syntax

Description of the illustration translate_using.eps

Purpose

TRANSLATE ... USING converts char into the character set specified for conversions between the database character set and the national character set.

Note:

The TRANSLATE ... USING function is supported primarily for ANSI compatibility. Oracle recommends that you use the TO_CHAR and TO_NCHAR functions, as appropriate, for converting data to the database or national character set. TO_CHAR and TO_NCHAR can take as arguments a greater variety of data types than TRANSLATE ... USING, which accepts only character data.

The char argument is the expression to be converted.

• Specifying the USING CHAR_CS argument converts char into the database character set. The output data type is VARCHAR2.

• Specifying the USING NCHAR_CS argument converts char into the national character set. The output data type is NVARCHAR2.

This function is similar to the Oracle CONVERT function, but must be used instead of CONVERT if either the input or the output data type is being used as NCHAR or NVARCHAR2. If the input contains UCS2 code points or backslash characters (\), then use the UNISTR function.

See Also:

• CONVERT and UNISTR

• Appendix C in Oracle Database Globalization Support Guide for the collation derivation rules, which define the collation assigned to the character return value of TRANSLATE ... USING

Examples

The following statements use data from the sample table oe.product_descriptions to show the use of the TRANSLATE ... USING function:

CREATE TABLE translate_tab (char_col  VARCHAR2(100),
                            nchar_col NVARCHAR2(50));
INSERT INTO translate_tab 
   SELECT NULL, translated_name
      FROM product_descriptions
      WHERE product_id = 3501;

SELECT * FROM translate_tab;

CHAR_COL             NCHAR_COL
-------------------- --------------------------------------------------
. . .
                     C pre SPNIX4.0 - Sys
                     C pro SPNIX4.0 - Sys
                     C til SPNIX4.0 - Sys
                     C voor SPNIX4.0 - Sys
. . .

UPDATE translate_tab 
   SET char_col = TRANSLATE (nchar_col USING CHAR_CS);

SELECT * FROM translate_tab;

CHAR_COL                  NCHAR_COL
------------------------- -------------------------
. . .
C per a SPNIX4.0 - Sys    C per a SPNIX4.0 - Sys
C pro SPNIX4.0 - Sys      C pro SPNIX4.0 - Sys
C for SPNIX4.0 - Sys      C for SPNIX4.0 - Sys
C til SPNIX4.0 - Sys      C til SPNIX4.0 - Sys
. . .