我有一个原始表,我想根据类别将一行分为两行。我的代码正在按预期运行。但是我想删除执行此任务的while循环。
我无法使用批量插入来执行此操作,我的代码无法用于更多记录,因为我在excel上传时正在执行此操作。
CREATE TABLE #RAW_TABLE (ID INT IDENTITY(1,1),FIELD1 VARCHAR(100),CATEGORY VARCHAR(100))
INSERT INTO #RAW_TABLE (FIELD1,CATEGORY) VALUES ('DATA','SINGLE')
INSERT INTO #RAW_TABLE (FIELD1,CATEGORY) VALUES ('DATA','SINGLE')
INSERT INTO #RAW_TABLE (FIELD1,CATEGORY) VALUES ('DATA','SPLIT')
INSERT INTO #RAW_TABLE (FIELD1,CATEGORY) VALUES ('DATA','SINGLE')
INSERT INTO #RAW_TABLE (FIELD1,CATEGORY) VALUES ('DATA','SINGLE')
CREATE TABLE #PROCESSED_TABLE (ID INT IDENTITY(1,1),FIELD1 VARCHAR(100),CATEGORY VARCHAR(100))
Declare @Int int,@Field1 Varchar(100),@Category Varchar(100)
WHILE ((SELECT COUNT(*) FROM #RAW_TABLE) > 0)
BEGIN
PRINT ''
SELECT top 1 @Int = ID,@Field1 = FIELD1,@Category = CATEGORY FROM #RAW_TABLE
if(@Category = 'SPLIT')
begin
insert into #PROCESSED_TABLE (FIELD1,CATEGORY) values (@Field1 + '-1',@Category)
insert into #PROCESSED_TABLE (FIELD1,CATEGORY) values (@Field1 + '-2',@Category)
end
else
begin
insert into #PROCESSED_TABLE (FIELD1,CATEGORY) Values (@Field1,@Category)
end
Delete from #RAW_TABLE Where id = @Int
END
Select * From #PROCESSED_TABLE
您可以通过查询执行所需的操作。无需循环:
insert into #processed_table (field1, category)
select (case when rt.category = 'SPLIT'
then concat(rt.field1, '-', v.n)
else rt.field1
end), rt.category
from #raw_table rt cross join
(values (1), (2)) v(n)
where v.n = 1 or rt.category = 'SPLIT';
您可以将UNION ALL
和INSERT两次放入SPLIT记录。
insert into #PROCESSED_TABLE (FIELD1,CATEGORY)
SELECT concat('DATA','-1') AS FIELD1, category FROM #RAW_TABLE as T1
WHERE T1.CATEGORY = 'SPLIT'
UNION ALL
SELECT concat('DATA','-2') AS FIELD1, category FROM #RAW_TABLE as T1
WHERE T1.CATEGORY = 'SPLIT'