UPDATE table SET column1 = expression1, column2 = expression2, ... column_n = expression_n [WHERE conditions]; OR The syntax for the Oracle UPDATE statement when updating one table with data from another table is: UPDATE table1 SET column1 = (SELECT expression1 FROM table2 WHERE conditio...
PL/SQL Records A record is a collection of data objects that are kept in fields, each having its own name and data type. A record can be thought of as a variable that can store a table row or a set of columns from a table row. Table columns relate to the fields. Records are made...
Table1-2 summarizes the PL/SQL compilation parameters. To display thevalues of these parameters for specified or all PL/SQL units, query the staticdata dictionary view ALL_PLSQL_OBJECT_SETTINGS. For information about thisview, see OracleDatabase Reference. 可以通...
PL/SQLループ内でSQL文を実行している場合、INSERT文、UPDATE文およびDELETE文のループのかわりに、FORALL文を使用することを検討します。 問合せの結果セットをループしている場合、単一の操作で結果セット全体をメモリーに格納する方法として、SELECTINTO文のBULK COLLECT句を使用することを検討しま...
UPDATE accts SET bal = my_bal + credit WHERE acctno = 7720; COMMIT WORK ; END ; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. COMMIT命令会释放作用于表和行的锁,也能清除自上一次提交或回滚之后的所有保存点。可选关键字WORK只是用于改善可读性而已。而关键字END代表了PL/SQL块的结束,而...
ALTER TABLE emp ADD Update_id NUMBER; CREATE OR REPLACE TRIGGER dept_cascade1 BEFORE UPDATE OF Deptno ON dept DECLARE -- Before updating dept table (this is a statement trigger), -- generate sequence number -- & assign it to public variable UPDATESEQ of -- user-defined package named INTEG...
本来只想测试一下Bulk Collect 和update性能的,但发现Bulk 的东西还是很多的,在OTN上搜了一些,整理如下。 1.1 Bulk Binding 和 Bulk SQL From:http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17125/adfns_packages.htm#ADFNS343 Oracle Database uses two engines to run PL/SQL blocks and su...
to use when manipulating table rows programatically, especially when a row is read (via SELECT, UPDATE...RETURNING or DELETE...RETURNING), manipulated programatically, and then recorded (via INSERT or UPDATE) in an another table with the same shape.Using RECORD binds for SQL in PL/SQL ...
PL/SQL Developer - News September 14, 2004 - Version 6.0.2 released Enhancements Partitioned tables were not detected correctly on Oracle8i Partitions tab page was visible when viewing a non-partitioned table Code Assistant did not describe materialized views ...
I can also call the function from within a SQL statement. In the following block, I insert the message into a database table: Copy code snippet Copied to Clipboard Error: Could not Copy Copied to Clipboard Error: Could not Copy BEGIN ...