1、建测试表
- 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、插入测试数据
- 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语句示例
(1)、insert all-不带条件
- 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-带条件
- 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-带条件
- 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、数据结果查看
- 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与first的区别
all:不考虑先后关系，只要满足条件，就全部插入；
first:考虑先后关系，如果有数据满足第一个when条件又满足第二个when条件，则执行第一个then插入语句，第二个then就不插入第一个then已经插入过的数据了。
其区别也可描述为，all只要满足条件，可能会作重复插入；first首先要满足条件，然后筛选，不做重复插入。
6、利用insert all实现行列转换（insert all的旋转功能）
- 1、建一行多列表及测试数据插入
- 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语句插入
- 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;
