Pre-Insert trigger Pre-Insert Fires during the Post and Commit Transactions process, before a row is inserted. It fires once for each record that is marked for insert. Example This example assigns aprimary keyfield based on asequencenumber, and then writes a row into an auditing table, flag...
-- statement级before trigger CREATEORREPLACETRIGGERsecure_emp BEFOREINSERTORDELETEORUPDATEONemployees BEGIN IF (TO_CHAR(SYSDATE,'DY')IN('SAT','SUN'))OR (TO_CHAR(SYSDATE,'HH24:MI')NOTBETWEEN'08:00'AND'18:00')THEN RAISE_APPLICATION_ERROR(-20500, 'You may modify EMPLOYEES table only on we...
A BEFORE INSERT Trigger means that Oracle will fire this trigger before the INSERT operation is executed. The syntax for an BEFORE INSERT Trigger is: CREATE or REPLACE TRIGGER trigger_name BEFORE INSERT ON table_name [ FOR EACH ROW ] DECLARE -- variable declarations BEGIN -- trigger code EXCE...
Example 9-13 Trigger Derives New Column Values(触发器派生新列值) CREATE OR REPLACE TRIGGER Derived BEFORE INSERT OR UPDATE OF Ename ON Emp /* Before updating the ENAME field, derive the values for the UPPERNAME and SOUNDEXNAME fields. Restrict users from updating these fields directly: */ FO...
Example:禁止在周四,周五修改emp表数据 CREATE OR REPLACE TRIGGER emp_trigger BEFORE UPDATE OR DELETE OR INSERT ON emp BEGIN IF to_char(sysdate,'day') IN ('星期四','星期五') THEN RAISE_APPLICATION_ERROR(-20008,'不允许在周四周五修改emp表'); END IF; END; ...
oracle trigger after insert 例子 在Oracle中,AFTER INSERT触发器表示在执行INSERT操作之后触发。下面是一个创建AFTER INSERT触发器的例子: ```sql CREATE OR REPLACE TRIGGER trg_xx AFTER insert ON t --AFTER 指定 触发时间,on后跟表名称,即当表有插入时触发事件 for each row --每一行 begin insert into ...
Create or replace trigger ai_emp After insert on emp For each row Begin :new.ename:=upper(:new.ename); End ai_emp; 以下说确的是(选一项) A. 触发器创建成功,该触发器将每次插入的新记录的ename列变为大写 B. 触发器创建成功,该触发器将每次insert语句插入的第一条记录的ename列变为大写 C. 触...
createorreplaceTRIGGERAFTERDELETEORINSERTORUPDATEON"PK","c1","c2"OFmy_name.my_tableFOREACHROW... 完成修改后,右键单击触发器名称并选择编译以编译修订后的触发器。 确保生成的触发器在编译后标识为有效。 如何还原已发布表或其关联的表空间以读取写入: ...
新增對基本ALTER TRIGGER/ALTER INDEXDDL 的支援 (啟用/停用等) 改進符合內建函式名稱的資料行轉換 為NULL-able 資料行產生篩選的唯一索引 改進Azure Synapse Analytics 的變數宣告轉換 修正專案名稱中特殊字元的問題 SSMA v8.8 SSMA for Oracle v8.8 版本包含: ...
TRIGGER -o triggers.sql -b %namespace%/schema/triggers -c %namespace%/config/ora2pg.conf ora2pg -p -t TYPE -o types.sql -b %namespace%/schema/types -c %namespace%/config/ora2pg.conf ora2pg -p -t VIEW -o views.sql -b %namespace%/schema/views -c %namespace%/config/ora...