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Common table expressions can also be used with the SELECT, INSERT, DELETE, and CREATE VIEW statements. For information about table hints, see , 'expression' should be prefixed with the capital letter 'N'.

For more information, see Specifies one or more table hints that are allowed for a target table. If 'N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column.

In the demonstration database, the customer.customer_num column is the primary key for that table, so this statement can update no more than one row.

You can also use subqueries in the specifies a new value for a column.

I am sure we all could write a simple program to do this in RPG using its native database access.

Mine looks like: 01 **free 02 dcl-pr QCMDEXC extpgm ; 03 *n char(100) options(*varsize) const ; 04 *n packed(15:5) const ; 05 end-pr ; 06 dcl-f TESTFILE usage(*update) keyed usropn ; 07 QCMDEXC('CPYF FROMFILE(TESTFSAVE) TOFILE(TESTFILE) MBROPT(*REPLACE)':56) ; 08 open TESTFILE ; 09 setll ('1') TESTFILER ; 10 dow (1 = 1) ; 11 reade ('1') TESTFILER ; 12 if (%eof) ; 13 leave ; 14 endif ; 15 FFIELD = 'A' ; 16 update TESTFILER %fields(FFIELD) ; 17 enddo ; 18 close TESTFILE ; 19 *inlr = *on ; running 7.3 I am going to use totally free RPG.

sql updating a row-14sql updating a row-78

This file will be used for update, it is keyed, and user opened.I thought it would be useful to show examples using both RPG native database access and SQL.First I need a file, as this is for example purposes it very simple, just two fields and one key field: What I want to do is to read/fetch all the records where the key field is equal to '1' and change the value of the second field to 'A'.Specifies the temporary named result set or view, also known as common table expression (CTE), defined within the scope of the UPDATE statement.The CTE result set is derived from a simple query and is referenced by UPDATE statement.This can also be used to change the column to NULL if the column has no default and is defined to allow null values.