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  • ORACLE 增加两列字段


    declare v_cnt number;
     V_SQL VARCHAR2 (500) := '';
    begin
     select count(*) into v_cnt from dual where exists(SELECT * FROM USER_TAB_COLUMNS WHERE TABLE_NAME = UPPER('TB_FDN_DEVICEACCOUNT') AND COLUMN_NAME = 'NSBFL');
       if v_cnt = 0 then
        V_SQL := 'ALTER TABLE TB_FDN_DEVICEACCOUNT ADD NSBFL NVARCHAR2(50)';
        EXECUTE IMMEDIATE V_SQL;
        V_SQL := 'comment on column TB_FDN_DEVICEACCOUNT.NSBFL is ''原设备分类''';
        EXECUTE IMMEDIATE V_SQL;
    end if;
     select count(*) into v_cnt from dual where exists(SELECT * FROM USER_TAB_COLUMNS WHERE TABLE_NAME = UPPER('TB_FDN_DEVICEACCOUNT') AND COLUMN_NAME = 'NSBLX');
       if v_cnt = 0 then
        V_SQL := 'ALTER TABLE TB_FDN_DEVICEACCOUNT ADD NSBLX NVARCHAR2(50)';
        EXECUTE IMMEDIATE V_SQL;
        V_SQL := 'comment on column TB_FDN_DEVICEACCOUNT.NSBLX is ''原设备类型''';
        EXECUTE IMMEDIATE V_SQL;
    end if;
    end;

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  • 原文地址:https://www.cnblogs.com/daimaxuejia/p/6780125.html
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