oracle插入多表(insert all/first)

1、建測試表

 CREATE TABLE EDW_INT ( AGMT_NO VARCHAR2(40 BYTE) NOT NULL, AGMT_SUB_NO VARCHAR2(4 BYTE) NOT NULL, NEED_REPAY_INT NUMBER(22,2), CURR_PERIOD NUMBER(4) NOT NULL ); CREATE TABLE EDW_INT_1 ( AGMT_NO VARCHAR2(40 BYTE) NOT NULL, AGMT_SUB_NO VARCHAR2(4 BYTE) NOT NULL, NEED_REPAY_INT NUMBER(22,2), CURR_PERIOD NUMBER(4) NOT NULL ); CREATE TABLE EDW_INT_2 ( AGMT_NO VARCHAR2(40 BYTE) NOT NULL, AGMT_SUB_NO VARCHAR2(4 BYTE) NOT NULL, NEED_REPAY_INT NUMBER(22,2), CURR_PERIOD NUMBER(4) NOT NULL );

2、插入測試數據

 INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20003874', '2104', 3126.5, 7); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20003874', '2104', 3290.76, 6); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20003874', '2104', 3454.06, 5); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20003874', '2104', 3616.41, 4); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20017143', '2104', 2350.86, 0); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20017143', '2104', 3566.55, 0); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20018273', '2104', 1639.46, 0); INSERT INTO EDW_INT (AGMT_NO, AGMT_SUB_NO, NEED_REPAY_INT, CURR_PERIOD) VALUES ('20018273', '2104', 2080.49, 0); COMMIT;

3、insert all/first語句示例

(1)、insert all-不帶條件

 insert all into edw_int_1(agmt_no,agmt_sub_no,need_repay_int,curr_period) values(agmt_no,agmt_sub_no,need_repay_int,curr_period) into edw_int_2(agmt_no,agmt_sub_no,curr_period) values(agmt_no,'1234',curr_period) select agmt_no,agmt_sub_no,need_repay_int,curr_period from edw_int; commit;

(2)、insert all-帶條件

 insert all when curr_period=0 then into edw_int_1(agmt_no,agmt_sub_no,need_repay_int,curr_period) values(agmt_no,agmt_sub_no,need_repay_int,curr_period) else into edw_int_2(agmt_no,agmt_sub_no,need_repay_int,curr_period) values(agmt_no,agmt_sub_no,need_repay_int,curr_period) select agmt_no,agmt_sub_no,need_repay_int,curr_period from edw_int; commit;

(3)、insert first-帶條件

 insert first when curr_period=0 then into edw_int_1(agmt_no,agmt_sub_no,need_repay_int,curr_period) values(agmt_no,agmt_sub_no,need_repay_int,curr_period) when agmt_sub_no='2104' then into edw_int_2(agmt_no,agmt_sub_no,need_repay_int,curr_period) values(agmt_no,agmt_sub_no,need_repay_int,curr_period) select agmt_no,agmt_sub_no,need_repay_int,curr_period from edw_int; commit;

 

4、數據結果查看

 truncate table edw_int_1; truncate table edw_int_2; select * from edw_int; select * from edw_int_1; select * from edw_int_2;

5、all與first的區別

all:不考慮先後關係，只要滿足條件，就全部插入；

first:考慮先後關係，如果有數據滿足第一個when條件又滿足第二個when條件，則執行第一個then插入語句，第二個then就不插入第一個then已經插入過的數據了。

其區別也可描述爲，all只要滿足條件，可能會作重複插入；first首先要滿足條件，然後篩選，不做重複插入。

6、利用insert all實現行列轉換（insert all的旋轉功能）

1、建一行多列表及測試數據插入 create table week_bal(id int,w1_bal number,w2_bal number,w3_bal number,w4_bal number,w5_bal number); insert into week_bal values(1,10.09,12.98,23.89,89.08,1098.01); commit; select * from week_bal; 2、建少列多行表 create table week_bal_new(id int,week int,bal number); 3、利用insert all語句插入 insert all into week_bal_new(id,week,bal)values(id,1,w1_bal) into week_bal_new(id,week,bal)values(id,2,w2_bal) into week_bal_new(id,week,bal)values(id,3,w3_bal) into week_bal_new(id,week,bal)values(id,4,w4_bal) into week_bal_new(id,week,bal)values(id,5,w5_bal) select id,w1_bal,w2_bal,w3_bal,w4_bal,w5_bal from week_bal; select * from week_bal_new;