指定列的順序同時不破壞數據的步驟

--T_LAW_RULE ALTER TABLE T_LAW_RULE    drop primary key; --刪除主鍵 ALTER TABLE T_LAW_RULE MODIFY(ID  NULL);    --設爲null ALTER TABLE T_LAW_RULE ADD(ID_TMP CHAR(32));  --添加一臨時列 create table T_LAW_RULE_copy as select * from T_LAW_RULE; --複製表以及數據 update T_LAW_RULE a set a.ID_TMP=(select b.ID from T_LAW_RULE_copy b where b.ID=a.ID) where exists (select 1 from T_LAW_RULE_copy b where a.ID=b.ID);    --插入數據 drop table T_LAW_RULE_copy; --刪除表以及數據 ALTER TABLE T_LAW_RULE DROP COLUMN ID;  --刪除原來列 alter table T_LAW_RULE rename column ID_TMP to ID; --修改臨時列列名 ALTER TABLE  "T_LAW_RULE" ADD CHECK ("ID" IS NOT NULL); ALTER TABLE  "T_LAW_RULE" ADD PRIMARY KEY ("ID"); --建立臨時表 CREATE TABLE "CCNTBPM_KJ"."T_LAW_RULE_TMP" ( "ID" CHAR(32 BYTE) NOT NULL  , "LAWS_NAME" VARCHAR2(200 BYTE) NULL , "TITLE" VARCHAR2(200 BYTE) NULL , "ISDELETED" CHAR(1 BYTE) DEFAULT '0'  NULL , "CREATOR" VARCHAR2(32 BYTE) NULL , "UPDATER" VARCHAR2(32 BYTE) NULL , "CREATIME" DATE DEFAULT sysdate  NULL , "UPDATIME" DATE NULL , "DISOBEYRULE" CHAR(1 BYTE) NULL , "BODY" CLOB NULL ) LOGGING NOCOMPRESS NOCACHE ; COMMENT ON TABLE "CCNTBPM_KJ"."T_LAW_RULE_TMP" IS 't_law_rule(法律法規表)'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."LAWS_NAME" IS '法律法規名稱'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."TITLE" IS '章節標題'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."ISDELETED" IS '是否刪除'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."CREATOR" IS '建立者'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."UPDATER" IS '修改者'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."CREATIME" IS '建立時間'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."UPDATIME" IS '修改時間'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."DISOBEYRULE" IS '違罰則管理 1爲違則，2爲罰則'; COMMENT ON COLUMN "CCNTBPM_KJ"."T_LAW_RULE_TMP"."BODY" IS '正文內容'; INSERT into "T_LAW_RULE_TMP" select t.ID,t.LAWS_NAME,t.TITLE,t.ISDELETED,t.CREATOR,t.UPDATER,t.CREATIME,t.UPDATIME,t.DISOBEYRULE,t.BODY from T_LAW_RULE t; drop table T_LAW_RULE; --刪除表以及數據 ALTER table T_LAW_RULE_TMP rename to T_LAW_RULE; --更名 ALTER TABLE  "T_LAW_RULE" ADD CHECK ("ID" IS NOT NULL); ALTER TABLE  "T_LAW_RULE" ADD PRIMARY KEY ("ID");