我在Table1中有几个字符串,我想根据表2中的值进行更新。SQL Server拼图 - 在逗号之前复制逗号并替换字符串?
示例代码
http://rextester.com/HQFOQ18215
IF OBJECT_ID('Test1','U') iS NOT NULL
DROP TABLE Test1;
IF OBJECT_ID('Test2','U') iS NOT NULL
DROP TABLE Test2;
Create table Test1
(
Id INT
,Lid INT
,MyString VARCHAR(MAX)
,Did INT
,Secid INT
);
INSERT INTO Test1 values (1,100,'you,shall,not,pass,gandlaf,the,grey', 401, 501);
INSERT INTO Test1 values (2,100,'ok,fine,bye', 401, 501);
INSERT INTO Test1 values (3,100,'test,dev,uat,prod', 403, 501);
INSERT INTO Test1 values (4,100,'1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16', 404, 501);
Create table Test2
(
Id INT IDENTITY(1,1)
,SecId INT
,CommaPosition INT
,Value VARCHAR(50)
,Did INT
,RowId INT
);
INSERT INTO Test2 Values (501, 4, '[Quantity]', 401, 1);
INSERT INTO Test2 Values (501, 14, '[Price]', 401, 1);
INSERT INTO Test2 Values (501, 4, '[Quantity]', 401, 2);
INSERT INTO Test2 Values (501, 14, '[Price]', 401, 2);
INSERT INTO Test2 Values (501, 14, '[Quantity|Price]', 403, 3);
INSERT INTO Test2 Values (501, 4, '[Interest]', 404, 4);
INSERT INTO Test2 Values (501, 14, '[Expired]', 404, 4);
SELECT * FROM Test1;
SELECT * FROM Test2;
期望输出
/*
Expected OUTPUT
Id Lid MyString Did Secid
1 100 you,shall,not,[quantity],gandlaf,the,grey,,,,,,,[Price], 401 501
2 100 ok,fine,bye,[quantity],,,,,,,,,,[Price], 402 501
3 100 test,dev,uat,prod,,,,,,,,,,[Quantity|Price], 403 501
4 100 1,2,3,[Quantity],5,6,7,8,9,10,11,12,13,[Price],15,16 404 501
*/
第一串
you,shall,not,pass,gandlaf,the,grey
其中"pass"
是之前其通过[quantity]
从表2但是这并未替换第四逗号位置't h ave第14个逗号 所以逗号被复制直到它到达第14个逗号并且在第14个逗号[Price]
被替换之前。最终输出是"you,shall,not,[quantity],gandlaf,the,grey,,,,,,,[Price],"
第二个字符串
ok,fine,bye
没有逗号第四十四任逗号,所以第4逗号添加和[quantity]
之前在表2和最终被取代,然后加逗号,直到第14位的逗号位置列 BASD字符串将成为ok,fine,bye,[quantity],,,,,,,,,,[Price],
三串
test,dev,uat,prod
只有14逗号位置表2中可用,因此逗号被复制,直到14日逗号和14逗号之前[Quantity|Price]
串 加入最终的字符串变成test,dev,uat,prod,,,,,,,,,,[Quantity|Price],
在第四根弦
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16
如果你看到第4和第14次成为逗号可用,因此14日逗号之前的字符串被替换[Interest]
和字符串成为14逗号被[Expired]
替换而将余下的字符串不变。
我想实现上面的输出,我试过下面的update语句没有给我想要的结果。
UPDATE T1
SET T1.MyString = T1.MyString + REPLICATE(',',T2.CommaPosition - (len(T1.MyString) - LEN(REPLACE(T1.MyString,',',''))))
FROM Test1 as T1 INNER JOIN Test2 as T2 ON T1.Secid = T2.SecId AND T1.Did = T2.Did AND T1.Id = T2.RowId;
SELECT DISTINCT T1.Lid, T1.MyString, T1.Did, T1.Secid, T2.RowId
FROM Test1 as T1 INNER JOIN Test2 as T2 ON T1.Secid = T2.SecId AND T1.Did = T2.Did AND T1.Id = T2.RowId;
这根本没有任何意义。为什么你首先有这些奇怪的分隔字符串?这违反了1NF并且破坏了关系数据的整个观点。 –