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  • Oracle 傻瓜式数据归档

    推荐用方法二

    方法一 【本库备份,分区表需要另写CREATE TABLE方法】
    -----------------------------------------------
    CREATE TABLE PH_PRESCRIPTION_T AS SELECT * FROM PH_PRESCRIPTION WHERE 1=0;
    CREATE TABLE PH_PRESCRIPTION_ITEM_T AS SELECT * FROM PH_PRESCRIPTION_ITEM WHERE 1=0;
    CREATE TABLE PH_AUDIT_PRESCRIPTION_T AS SELECT * FROM PH_AUDIT_PRESCRIPTION WHERE 1=0;
    CREATE TABLE PH_AUDIT_PRESCRIPTION_ITEM_T AS SELECT * FROM PH_AUDIT_PRESCRIPTION_ITEM WHERE 1=0;
    
    RENAME  PH_PRESCRIPTION TO PH_PRESCRIPTION_19;
    RENAME  PH_PRESCRIPTION_T TO PH_PRESCRIPTION;
    
    RENAME  PH_PRESCRIPTION_ITEM TO PH_PRESCRIPTION_ITEM_19;
    RENAME  PH_PRESCRIPTION_ITEM_T TO PH_PRESCRIPTION_ITEM;
    
    RENAME  PH_AUDIT_PRESCRIPTION TO PH_AUDIT_PRESCRIPTION_19;
    RENAME  PH_AUDIT_PRESCRIPTION_T TO PH_AUDIT_PRESCRIPTION;
    
    RENAME  PH_AUDIT_PRESCRIPTION_ITEM TO PH_AUDIT_PRESCRIPTION_ITEM_19;
    RENAME  PH_AUDIT_PRESCRIPTION_ITEM_T TO PH_AUDIT_PRESCRIPTION_ITEM;
    
    
    ============================================================ 
    方法二 先操作方法一,否则因为 数据量大,CREATE TABLE 时间长,造成数据丢失
    -----------------------------------------------
    
    CREATE TABLE PHARMACY_ARCHIVE.PH_PRESCRIPTION_19 AS SELECT * FROM PHARMACY.PH_PRESCRIPTION_19;
    CREATE TABLE PHARMACY_ARCHIVE.PH_PRESCRIPTION_ITEM_19 AS SELECT * FROM PHARMACY.PH_PRESCRIPTION_ITEM_19;
    CREATE TABLE PHARMACY_ARCHIVE.PH_AUDIT_PRESCRIPTION_19 AS SELECT * FROM PHARMACY.PH_AUDIT_PRESCRIPTION_19;
    CREATE TABLE PHARMACY_ARCHIVE.PH_AUDIT_PRESCRIPTION_ITEM_19 AS SELECT * FROM PHARMACY.PH_AUDIT_PRESCRIPTION_ITEM_19;
    DROP TABLE PHARMACY.PH_PRESCRIPTION_19;
    DROP TABLE PHARMACY.PH_PRESCRIPTION_ITEM_19;
    DROP TABLE PHARMACY.PH_AUDIT_PRESCRIPTION_19;
    DROP TABLE PHARMACY.PH_AUDIT_PRESCRIPTION_ITEM_19;
    
    ============================================================ 
    方法三,原理等同于方法二,性能高于方法二。再用 导出、导入 方法
    -----------------------------------------------
    expdp pharmacy_archive/pharmacy_archive directory=dump_dir dumpfile=LH_BAK_20190228.dmp tables=PH_PRESCRIPTION_19,PH_PRESCRIPTION_ITEM_19,PH_AUDIT_PRESCRIPTION_19,PH_AUDIT_PRESCRIPTION_ITEM_19 logfile=EXP_LH_BAK_20190228.log compression=all
    impdp 导入 
    DROP TABLE PHARMACY.PH_PRESCRIPTION_19;
    DROP TABLE PHARMACY.PH_PRESCRIPTION_ITEM_19;
    DROP TABLE PHARMACY.PH_AUDIT_PRESCRIPTION_19;
    DROP TABLE PHARMACY.PH_AUDIT_PRESCRIPTION_ITEM_19;
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  • 原文地址:https://www.cnblogs.com/vipsoft/p/10445802.html
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