Oracle 触发器中NEW和OLD关修饰词说明

触发器中OLD 和 NEW修饰词，old 表明变动前记录，new表明变动后的记录。sql CREATE OR REPLACE TRIGGER derive_commission_pct BEFORE INSERT OR UPDATE OF salary ON employees FOR EACH ROW WHEN (NEW.job_id = 'SA_REP') BEGIN IF INSER

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