在存储过程、PL/SQL块里需要返回INSERT、DELETE、UPDATE、MERGE等DML语句执行后的信息时使用,合理使用returning能够简化程序逻辑、提高程序性能。 概述 创建测试表 create table hh_emp_test as select * from scott.emp; 使用returning语句 declare v_empno hh_emp_test
RETURNINGSUM(salary)INTO:bnd1; print bnd1 rollback; Update Object Table Update a table objectUPDATE <alias> SET VALUE (<alias>) = ( <SELECT statement>) WHERE <column_name> <condition> <value>; CREATE TYPE people_typ AS OBJECT ( last_name VARCHAR2(25), department_id NUMBER(4), sala...
update hh_emp_test set ename='test' where deptno=10 returning empno,ename bulk collect into v_tab_empno,v_tab_ename; rollback; for i in 1..v_tab_empno.count loop dbms_output.put_line(v_tab_empno(i)||'-'||v_tab_ename(i)); end loop; end; 1. 2. 3. 4. 5. 6. 7. 8. ...
oracle中分批提交insert 事务,以防止redo占用太多可以分批提交事务:以下是三种不同的pl/sql体: 1、编写一个简单的PL/SQL块来模拟逐行提交的情况,注意观察执行时间。 我们的目标是将t_ref表中的数据全部插入到t中。 sec@ora10g> set timing on sec@ora10g> DECLARE 2 BEGIN 3 FOR cur IN (SELECT * FROM t...
PreparedStatement ps = null; ResultSet rs = null; try { ps = conn.prepareStatement(sql); try { rs = ps.executeQuery(); while (rs.next()) { // process row } } finally { if (rs != null) rs.close(); } } finally { if (ps != null) ps.close(); } 단순 데이터 ...
この項で説明する代入規則は、INSERT/UPDATE文、RETURNING句、ファンクションのパラメータ、およびPL/SQL変数に適用されます。 オブジェクト代入の代表的なオブジェクト 代入性とは、上位のスーパータイプの1つの代理を務めるサブタイプの能力のことです。サブタイプのかわりにスーパータイプを使用...
Retrieves the batch value of this statement for the Oracle update batching model (default is set by the connection object). java.sql.ResultSet getReturnResultSet() Returns result set that contains data returned from DML Returning. OracleParameterMetaData OracleGetParameterMetaData() Retrieves the ...
If the value is true, and if the shared pool has no space fora new SQL statement, then the statement cannot be parsed, and Oracle Databasereturns an error saying that there is no more shared memory. Ifthe value is false, and if there is no space for a new statement, then OracleData...
One of the topics I’ve found very interesting as I started blogging was the sometimes strange behavior of theMERGEstatement, the reasons forORA-30926and what it has to do with write consistency. My first blog post about it was almost exactly ten years ago. Time for a follow up! Especiall...
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