sql不常用的insert语句

不怎么常用的INSERT功能：

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insert into table-name select ...

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

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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

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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;

/