logscriptafter

这是Getting Started With Sqlite 的相关示例代码和帮助文件

-- ******************************************************************************
--  logScriptAFTER: Script for creating log table and related triggers
--   Usage:
--       $ sqlite3 msgdatabase < logScript
--
--   
-- ******************************************************************************
CREATE TABLE log (lkey INTEGER PRIMARY KEY, 
                  mkey INTEGER,
                  mesgOLD TEXT, 
                  mesgNEW TEXT,
                  sqlType VARCHAR(15),
                  mesgtimeEnter    DATE,
                  mesgtimeUpdate   DATE,
                  timeEnter        DATE);


CREATE TRIGGER update_log UPDATE OF mesg ON mesg  
BEGIN     
INSERT INTO log  (mkey,mesgOLD,mesgNEW,sqlType,mesgtimeEnter,mesgtimeUpdate,timeEnter) 
          values (old.mkey,old.mesg, new.mesg, 'UPDATE',old.timeEnter,DATETIME('NOW'),DATETIME('NOW') );     
END;
-- 
--  Also create an insert log
CREATE TRIGGER insert_log AFTER INSERT ON mesg  
BEGIN     
INSERT INTO log  (mkey,mesgNEW,sqlType,mesgtimeEnter,timeEnter) 
          values (new.mkey ,new.mesg,'INSERT',new.timeEnter,DATETIME('NOW') );     
END;

--  Also create a DELETE entry in log
CREATE TRIGGER delete_log DELETE ON mesg  
BEGIN     
INSERT INTO log  (mkey,mesgOLD,sqlType,timeEnter) 
          values (old.mkey,old.mesg,'DELETE',DATETIME('NOW') );     
END;
-- ******************************************************************************