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  • Oracle中特殊的INSERT语句

    ---------------------------------------
    insert into table-name select ...

    ---------------------------------------
    insert into table-name values(coL-values, ... default)

    ---------------------------------------
    CREATE TABLE raises (emp_id NUMBER, sal NUMBER
       CONSTRAINT check_sal CHECK(sal > 8000));

    EXECUTE DBMS_ERRLOG.CREATE_ERROR_LOG('raises', 'errlog');

    INSERT INTO raises
       SELECT employee_id, salary*1.1 FROM employees
       WHERE commission_pct > .2
       LOG ERRORS INTO errlog ('my_bad') REJECT LIMIT 10;

    SELECT ORA_ERR_MESG$, ORA_ERR_TAG$, emp_id, sal FROM errlog;

    ORA_ERR_MESG$               ORA_ERR_TAG$         EMP_ID SAL
    --------------------------- -------------------- ------ -------
    ORA-02290: check constraint my_bad               161    7700
     (HR.SYS_C004266) violated

    -----------------------------------------
    The multitable insert statement looks like this:

    INSERT ALL
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date, sales_sun)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+1, sales_mon)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+2, sales_tue)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+3, sales_wed)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+4, sales_thu)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+5, sales_fri)
          INTO sales (prod_id, cust_id, time_id, amount)
          VALUES (product_id, customer_id, weekly_start_date+6, sales_sat)
       SELECT product_id, customer_id, weekly_start_date, sales_sun,
          sales_mon, sales_tue, sales_wed, sales_thu, sales_fri, sales_sat
          FROM sales_input_table;

    INSERT ALL
       WHEN order_total < 100000 THEN
          INTO small_orders
       WHEN order_total > 100000 AND order_total < 200000 THEN
          INTO medium_orders
       ELSE
          INTO large_orders
       SELECT order_id, order_total, sales_rep_id, customer_id
          FROM orders;

    INSERT ALL
       WHEN order_total < 1000000 THEN
          INTO small_orders
       WHEN order_total > 1000000 AND order_total < 2000000 THEN
          INTO medium_orders
       WHEN order_total > 2000000 THEN
          INTO large_orders
       SELECT order_id, order_total, sales_rep_id, customer_id
          FROM orders;

    INSERT FIRST
       WHEN ottl < 100000 THEN
          INTO small_orders
             VALUES(oid, ottl, sid, cid)
       WHEN ottl > 100000 and ottl < 200000 THEN
          INTO medium_orders
             VALUES(oid, ottl, sid, cid)
       WHEN ottl > 290000 THEN
          INTO special_orders
       WHEN ottl > 200000 THEN
          INTO large_orders
             VALUES(oid, ottl, sid, cid)
       SELECT o.order_id oid, o.customer_id cid, o.order_total ottl,
          o.sales_rep_id sid, c.credit_limit cl, c.cust_email cem
          FROM orders o, customers c
          WHERE o.customer_id = c.customer_id;


    Ref: http://www.dba-oracle.com/oracle_news/2005_5_9_converting_long_lob_data_types.htm

    Using TO_LOB one can easily convert LONGS to LOBS.
    Using the same conversion function one can convert LONG into CLOB and LONGRAW TO BLOB.

    Have a look into following example

    SQL>create table tlong(itemcd number(30),itemdesc long);
    /

    Table created.

    SQL>Create table tlob(ItemCd Number(30),Itemdesc clob);
    Table created

    Now dump some values from some table into table tlong
    SQL>insert into tlong select icode,iname from InvTab;
    2000 rows created.

    Now try to insert into lob table from long table
    SQL>Insert into tlob select itemcd,TO_LOB(itemdesc) from tlong
    2000 rows created.

    but in PL/SQL you need to handle different way
    normal select into insert will not work,but excute immediate will be the workaround in oracle 8.1.7

    Let's see how it can be done PL/SQL
    begin
    insert into tlob select itemcd,TO_LOB(itemdesc) from tlong;
    end;
    /

    the above pl/sql block works well with oralce 9i and oracle 10g but fails in oracle 8.1.7 with the following error
    ERROR at line 2:
    ORA-06550: line 2, column 33:
    PLS-00201: identifier 'TO_LOB' must be declared
    ORA-06550: line 2, column 1:
    PL/SQL: SQL Statement ignored

    Then you should use dynamic sql (Execute Immediate 'SQL statement') as follows
    begin
    execute immediate 'insert into tlob select itemcd,TO_LOB(itemdesc) from tlong';
    end;
    /

    insert into tbclustertogrid
      (clusterno, rectsmid, rectspec, vcdist_id)
      select '{0}', '{1}', '500', '{2}'
        from dual
       where not exists (select clusterno
                from TBCLUSTERTOGRID
               where clusterno = '{0}'
                 and rectsmid = '{1}'
                 and vcdist_id = '{2}')

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  • 原文地址:https://www.cnblogs.com/myssh/p/1673463.html
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