Assume there is a parent and child tables inSQLServer: -- Parent tableCREATETABLEstates(idCHAR(2)PRIMARYKEY,nameVARCHAR(70));-- Child tableCREATETABLEcities(nameVARCHAR(70),stateCHAR(2)REFERENCESstates); Now if you try to remove the parent tablestates, the DROP TABLE statement fails: DROPTAB...
Insert data in parent and child table (one row in parent table and multiple rows in child table) Insert data to Parent and Child table insert data to table from batch file? Insert Empty row depending on group data INSERT EXEC failed because the stored procedure altered the schema of the ta...
For SQL Server, there are a number of ways to do this in T-SQL. However, the solution can vary depending upon your application and the use patterns. Generally, the best way that I have done this is to write a UDF that returns a table result rather than in-line SQL code. Solutions ...
--调用方法:--select * from GetChild('24')--select id from GetChild('24')--select * from KuCun where ProductType in(select id from GetChild('24'))Createfunction[dbo].[GetChild](@IDvarchar(10))returns@ttable(IDvarchar(10),ParentIDvarchar(10),Levelint)asbegindeclare@iintset@i=1inse...
I know update and delete cascade will update and delete automatically in child table when any changes happen in parent table but how about insert data in parent , does insert data in parent table will automatically insert in child table
Createfunction[dbo].[GetChild](@IDvarchar(10)) returns@ttable(IDvarchar(10),ParentIDvarchar(10),Levelint) as begin declare@iint set@i = 1 insertinto@tselect@ID,@ID,0--当前级,本级,如果不要的话可以注释掉或再加个参数来选择操作
)SELECT*FROMcompany_employeesWHEREorder_indexIN(1,2) In this query I have user common table expression (neater replacement for sub-query) where I have joined parent and child table. ROW_NUMBER function returns me index of the employee partitioned by companies ordered in the by the date hired...
Here, in this post, we will try to manage data with hierarchical relation or parent-child relation of a specific table in SQL server. Our special concentration would be over. Show Generations of each row Find all possible parents of a specific row ...
I need a table structure where i can add multiple parent and multiple child. Even the child can be a parent to another child. Give me the table structure and a small program code if possible. Expecting your replies asap. Thank you in advance. ...
[NB. This is a derivative of a question posed on MS Sql Svr forum.] I have a classic self-referring table USER(USER_ID,PARENT) I want to list all users in...