这意味着我们必须在表发生变化时从x2中进行选择。（由于delete语句可以影响多行，因此AFTER ROW不一定表...
Second, create a new trigger associated with thecustomerstable: CREATEOR REPLACETRIGGERcustomers_audit_trgAFTERUPDATEORDELETEONcustomersFOREACHROWDECLAREl_transaction VARCHAR2(10);BEGIN-- determine the transaction typel_transaction :=CASEWHENUPDATINGTHEN'UPDATE'WHENDELETINGTHEN'DELETE'END;-- insert a row...
insert into t3 values(2,'mike');insert into t3 values(3,'brain');insert into t3 values(4,'cade');commit; SQL>update t3 set name='nelson' where id=4;SQL>commit;SQL>delete t3 where id=2;SQL>commit;SQL>update t3 set id=id+100;SQL>commit;看看t3表经历的时间变化SQL> select versions...
Since there’sonly a limited number of entries in a transaction table and a limited number ofundo segments in an undo tablespace, you can only record details about arelatively small number of recent transactions, and you will have to keepreusing the transaction table entries. Reusing the entries...
Get tables This operation gets tables from a database. Insert row This operation inserts a new row into a table. Update row This operation updates an existing row in a table.Delete rowOperation ID: DeleteItem This operation deletes a row from a table. Parameters 展開資料表 NameKeyRequired...
Once that's done you just have to set the type of export you want: TABLE with constraints, VIEW, MVIEW, TABLESPACE, SEQUENCE, INDEXES, TRIGGER, GRANT, FUNCTION, PROCEDURE, PACKAGE, PARTITION, TYPE, INSERT or COPY, FDW, QUERY, KETTLE, SYNONYM. By default Ora2Pg exports to a file that...
CREATE TABLE CREATE PUBLIC SYNONYM DROP PUBLIC SYNONYM CREATE VIEW CREATE SEQUENCE CREATE PROCEDURE CREATE TRIGGER You Encounter Permissions Issues for the Replication User Schema The replication user schema must have the permissions described in "Creating the User Schema Manually" inConfigure an Oracle ...
If the unique combination is comprised of multiple fields, call the CHECK_UNIQUE package from the WHEN-VALIDATE- RECORD trigger. Example: PROCEDURE CHECK_UNIQUE(X_ROWID VARCHAR2, pkey1 type1, pkey2 type2, ...) IS DUMMY NUMBER; BEGIN SELECT COUNT(1) INTO DUMMY FROM table WHERE pkeycol1 ...
create or replace trigger tgtemp before insert or update of len1,len2 on t_temp for each row begin :new.len:=:new.len1+:new.len2; end; oracle 不允许触发器修改它正在触发的表,故用before 可以,after不行.. 105. udump下的trc文件可以通过配置不让产生,利用命令 ...
-- pipelined table function 立即返回row 记录,而不同等待这个collection,从而减少constructed的时间,并且占用较少的内存。 Caution: A pipelined table function always references the currentstate of the data. If the data in the collection changes after thecursor opens for the collection, then the cursor ...