--查找触发器的名称selectobject_namefromuser_objectswhereonject_type='TRIGGER';--得到名称后, 查找触发器的内容select*fromuser_sourcewherename='first_trg'orderbyline; (二)触发器的语法 1.DDL事件的触发器: create alter drop CREATE[OR REPLACE]TRIGGER--触发器的名称[BEFORE | AFTER | INTEAD OF][DDL...
should not name the trigger BEFORE_UPDATE_ROW_LEVEL_BC. A better name would be BOOKSHELF_CHECKOUT_BEF_UPD_ROW. 在触发器中调用存储过程; Calling Procedures Within Triggers Rather than creating a large block of code within a trigger body, you can save the code as a stored procedure and call...
PLSQL_Oracle Trigger触发器的基本概念和用法 2014-06-14 Created By BaoXinjian 一、基本概念 触发器是许多关系数据库系统都提供的一项技术。在ORACLE系统里,触发器类似过程和函数,都有声明,执行和异常处理过程的PL/SQL块。 触发器在数据库里以独立的对象存储,它与存储过程和函数不同的是,存储过程与...
ALTER TRIGGER trigger_name {DISABLE | ENABLE}; 删除触发器 DROP TRIGGER trigger_name; 还可以使用ALTER TABLE命令,并附加使用ENABLE ALL TRIGGERS或DISABLE ALL TRIGGERS子句,同时将某一个表上的所有触发器开启或关闭。 ALTER TABLE table_name {ENABLE | DISABLE} ALL TRIGGERS; 可以通过user_triggers来查看相...
plsql_ccflags plsql_code_type plsql_debug plsql_optimize_level plsql_v2_compatibility plsql_warnings range_optimizer_max_mem_size sql_work_area tde_method writing_throttling_maximum_duration writing_throttling_trigger_percentage workarea_size_policy ob_query_switch_leader_retry_timeout kv_ttl_histor...
create or replace TRIGGER TRG_NAME BEFORE INSERT ON original_table FOR EACH ROW BEGIN IF :NEW.opt_value = 'BT' THEN INSERT INTO new_values (id_values, yr_month) with tab123 (h_value, l_value, y_month) as (select :NEW.high_value, cast(:NEW.low_value as number) , to_char(trunc...
trigger-name 指定触发器的名称。此名称(包括隐式或显式的模式名)不能标识已在目录中描述的触发器 (SQLSTATE 42710)。如果指定了两部分的名称,那么模式名不能以“SYS”开头 (SQLSTATE 42939)。 BEFORE 指定在将主题表的实际更新所引起的任何更改应用于数据库之前执行相关联的触发操作。 AFTER 指定在将主题表的实...
In the Oracle console, write an anonymous block that triggers the procedure. Click Debug. A code snippet of the package: CREATE PACKAGE PKG_DBGD AS {...} A code snippet of the anonymous block: DECLARE {...} Debug PL/SQL triggers through queries A trigger is a PL/SQL program...
数据服务器支持在 PL/SQL 上下文中使用行级和语句级触发器。 行级触发器对于触发事件所影响的每一行触发一次。例如,如果将删除定义为特定表的触发事件,并且单个 DELETE 语句从该表中删除五行,那么触发器会触发五次,即,对每一行触发一次。 语句级触发器仅对每个语句触发一次。在使用以上示例的情况下,如果将删除定义...
If a table has a before insert or update trigger that modifies column values, or if the table has default values for newly inserted records, the SQL Window grid will now immediately display these server-generated values after posting the new or modified record. You can now use a “Tab=<tit...