Transact SQL :: Delete Records From Table (Table1) Which Has A Foreign Key Column In Related Table (Table2)?
Jun 29, 2015
I need to delete records from a table (Table1) which has a foreign key column in a related table (Table2).
Table1 columns are: table1Id; Name. Table2 columns include Table2.table1Id which is the foreign key to Table1.
What is the syntax to delete records from Table1 using Table1.Name='some name' and remove any records in Table2 that have Table2.table1Id equal to Table1.table1Id?
How to delete records from multiple tables if main table’s entity is deleted as constraints is applied on all..There is this main table called Organization or TblOrganization.and this organization have branches which are in Brach table called tblBranch and this branch have multiple applications let say tblApplication and these application are used by multiple users called tblUsers.What I want is: when I delete the Organization All branches, application and users related to it must be deleted also.How I can apply that on a button click in asp.net web forms..Right now this is my delete function which is very simple
Public void Delete(int? id){ var str=”DELETE FROM tblOrganization WHERE organizationId=”+ id ; } And My tables LOOK LIKE this CREATE TABLE tblOrganization ( OrganizationId int, OrganizationName varchar(255)
Hi everyoneI am trying to create a DELETE Trigger. I have 2 tables. Table1 andTable2. Table 2 has all the same fields and records as Table1 + 1extra column "date_removed"I would like that when a record is deleted from Table 1, the triggerfinds that record in Table2 and updates the date_removed filed withcurrent time stamp.The primary key on both is combination of domain,admin_group and cn.CREATE TRIGGER [tr_updateTable2] ON [dbo].tbl_Table1FOR DELETEASUpdate Table2SET date_removed = getDate()I'm stuck here, how do I manipulate on Table2 only the records thatwere deleted on Table1, so to only update date_removed filed for themin Table2?I guess i need to compare domain, cn and admin_group, but I don't knowhow.Any help would be greatly appreciatedThanks! :-)
Hi guys,i have a little problem here.im attempting to write a stored procedure that compares two tables ofthe same data structure and adds (inserts) extra records that exist intable1 to table2.My problem is that i dont have a unique identifier between the tables.i think someone said that i needed to build up a keyany ideas greatly appreciated ??C
I have around 3 tables having around 20 to 30gb of data. My table A related to table B by a FK and same way table B related to table C by FK. I would like to delete all rows satisfying certain condition from table A and all corresponding related records from table B and C. I have created a query to delete the grandchild first, followed by child table and finally parent. I have used inner join in my delete query. As you all know, inner join delete operations, are going to be extremely resource Intensive especially on bigger tables.
What is the best approach to delete all these rows? There are many constraints, triggers on these tables. Also, there might be some FK relations to other tables as well.
--Table 1 "Employee" CREATE TABLE [MyCompany].[Employee]( [EmployeeGID] [int] IDENTITY(1,1) NOT NULL, [BranchFID] [int] NOT NULL, [FirstName] [varchar](50) NOT NULL, [MiddleName] [varchar](50) NOT NULL, [LastName] [varchar](50) NOT NULL, CONSTRAINT [PK_Employee] PRIMARY KEY CLUSTERED ( [EmployeeGID] ) GO ALTER TABLE [MyCompany].[Employee] WITH CHECK ADD CONSTRAINT [FK_Employee_BranchFID] FOREIGN KEY([BranchFID]) REFERENCES [myCompany].[Branch] ([BranchGID]) GO ALTER TABLE [MyCompany].[Employee] CHECK CONSTRAINT [FK_Employee_BranchFID]
-- Table 2 "Branch" CREATE TABLE [Mycompany].[Branch]( [BranchGID] [int] IDENTITY(1,1) NOT NULL, [BranchName] [varchar](50) NOT NULL, [City] [varchar](50) NOT NULL, [ManagerFID] [int] NOT NULL, CONSTRAINT [PK_Branch] PRIMARY KEY CLUSTERED ( [BranchGID] ) GO ALTER TABLE [MyCompany].[Branch] WITH CHECK ADD CONSTRAINT [FK_Branch_ManagerFID] FOREIGN KEY([ManagerFID]) REFERENCES [MyCompany].[Employee] ([EmployeeGID]) GO ALTER TABLE [MyCompany].[Branch] CHECK CONSTRAINT [FK_Branch_ManagerFID]
--Foreign IDs = FID --generated IDs = GID Then I try a simple single row DELETE
DELETE FROM MyCompany.Employee WHERE EmployeeGID= 39
Well this might look like a very basic error: I get this Error after trying to delete something from Table Employee?
The DELETE statement conflicted with the REFERENCE constraint "FK_Branch_ManagerFID". The conflict occurred in database "MyDatabase", table "myCompany.Branch", column 'ManagerFID'.
Yes what Ive been doing is to deactivate the foreign key constraint, in both tables when performing these kinds of operations, same thing if I try to delete a Branch? entry, basically each entry in branch? and Employee? is child of each other which makes things more complicated.
My question is, is there a simple way to overcome this obstacle without having to deactivate the foreign key constraints every time or a good way to prevent this from happening in the first place? Is this when I have to use ON DELETE CASCADE? or something?
Ok, I'm really new at this, but I am looking for a way to automatically insert new records into tables. I have one primary table with a primary key id that is automatically generated on insert and 3 other tables that have foreign keys pointing to the primary key. Is there a way to automatically create new records in the foreign tables that will have the new id? Would this be a job for a trigger, stored procedure? I admit I haven't studied up on those yet--I am learning things as I need them. Thanks.
I want to write a SQL statement that join Table1 and Table2 together, T2Field equal to XXX, and list all records from Table1. That's the result columns: T1PK, T1Field, T2PK, T2Field Result records: 1, ABC, 101, XXX 1, ABC, 103, XXX 2, DEF, 104, XXX 3, GHI, NULL, NULL
I have these two tables Log and CategoryLog, I need to archive records older than 13 months in these two tables to two separate tables and then delete the archived records from Log and CategoryLog tables. The problem is that only 'Log' table has a date column, the other table CategoryLog does not have any date column. But the two tables are connected by a column(LogID). How to archive the data and then delete the archive data from both tables.
I can't get my head around this:I want to select all IDs from table A that do not have a related record intable B according to some condition:Table A contains, say, Parents and table B contains Children. I want toselect all Parents that have no children called "Sally" (this is a noddyexample, reminds me of being at Uni again :) ).Any ideas?Thanks
Background: Am working on completing an ORM that can not only handles CRUD actions -- but that can also updates the structure of a table transparently when the class defs change. Reason for this is that I can't get the SQL scripts that would work for updating a software on SqlServer to be portable to other DBMS systems. Doing it by code, rather than SQL batch has a chance of making cross-platform, updateable, software...
Anyway, because it needs to be cross-DBMS capable, the constraints are that the system used must work for the lowest common denominator....ie, a 'recipe' of steps that will work on all DBMS's.
The Problem: There might be simpler ways to do this with SqlServer (all ears :-) - just in case I can't make it cross platform right now) but, with simplistic DBMS's (SqlLite, etc) there is no way to ALTER table once formed: one has to COPY the Table to a new TMP name, adding a Column in the process, then delete the original, then rename the TMP to the original name.
This appears possible in SqlServer too --...as long as there are no CASCADE operations. Truncate table doesn't seem to be the solution, nor drop, as they all seem to trigger a Cascade delete in the Foreign Table.
So -- please correct me if I am wrong here -- it appears that the operations would be along the lines of: a) Remove the Foreign Key references b) Copy the table structure, and make a new temp table, adding the column c) Copy the data over d) Add the FK relations, that used to be in the first table, to the new table e) Delete the original f) Done?
The questions are: a) How does one alter a table to REMOVE the Foreign Key References part, if it has no 'name'. b) Anyone know of a good clean way to get, and save these constraints to reapply them to the new table. Hopefully with some cross platform ADO.NET solution? GetSchema etc appears to me to be very dbms dependant? c) ANY and all tips on things I might run into later that I have not mentioned, are also greatly appreciated.
Previously same records exists in table having primary key and table having foreign key . we have faced 7 records were lost from primary key table but same record exists in foreign key table.
How do you express neither no in TSQL. I am trying to create a view that gathers work orders that are neither in one table nor in another I tried the following few appraoches but feel there must be something better. thanks!
1. Select * FROM xyz WHERE Status = Open AND (Number NOT IN (SELECT WONumber FROM dbo.Table1) OR Number NOT IN (SELECT WONumber FROM dbo.Table2)) 2. Select * FROM xyz WHERE Status = Open AND Number NOT IN (SELECT WONumber FROM dbo.Table1) UNION Select * FROM xyz WHERE Status = Open AND Number NOT IN (SELECT WONumber FROM dbo.Table2)
I am trying to write a query that will retrieve all students of a particular class and also any rows in HomeworkLogLine if they exist (but return null if there is no row). I thought this should be a relatively simple LEFT join but I've tried every possible combination of joins but it's not working.
SELECT Student.StudentSurname + ', ' + Student.StudentForename AS Fullname, HomeworkLogLine.HomeworkLogLineTimestamp, HomeworkLog.HomeworkLogDescription, ROW_NUMBER() OVER (PARTITION BY HomeworkLogLine.HomeworkLogLineStudentID ORDER BY
[Code] ...
It's only returning two rows (the students where they have a row in the HomeworkLogLine table).
Is there anyway or a sql statement that can do something like, Select * from table1 where table1 not in table2.which means i get all the rows in table1, as long as they r not in table2
Hi, I have a problem I have two tables, table1 my main table and table2 my secondary table. Table1 has lots of records with a field for a unique transaction number, table2 also has a field for a transaction number. Table 2 only has a 10 entries in with the same transaction number of 10 of the entries in table1. My question is how do I get all the records from table1 that DONT have a corrisponding transaction number in table2.
I'm using MSSQL and I have 2 tables with same structure. Can any one tell me the easiest way on how to select a row from table1 and insert it into table2.
Now, I want to check whether all the codes in table1 existing in table2 and list them, and if both columns from table1 is matching with the both columns in table2. For e.g. 256|abc in table1 is matching with 256|abc in table2
Query 1 -- select last record SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY Custid ORDER BY Date DESC) AS Seq,* FROM Living_Situation )t WHERE Seq=1
The problem of mine is, I have a datagrid, Which displays data from a Employee(parent) table. Now I want to delete some records based on the user selected checkbox,only those records which has no related records in the EmployeeProject(child) can be deleted.I want to know which are all the record that cannot be deleted? How can I achieve this?
I am looking to delete a single row from a relatively small table. Unfortunately, there is a foreign key relationship between this table and a much much larger table. The checking of this foreign key when I am deleting this row seems to significantly impact the performance of the operation. Previously there was an index on this larger table that helped this query run. This index has been dropped to improve the performance of a more frequently executed operation.
Is there a way I can use a hint or something to stop SQL checking this foreign key when deleting the row? I am certain that there are no associated rows in the larger table.
I have read elsewhere that I could disable the foreign key, perform the delete, then enable the foreign key. This delete statement is not a one off process and could happen in the normal operation of the application so I don't really know what the implications of doing this are.
I'm trying to update a value into a table a sum. The two tables have ID values. These ID values appear once in Table1 and multiple times in Table2. I'm currently trying to sum up the values in Table2 where the IDs are equal to Table1 and then update the value:
UPDATE [Table1] SET [Total] = (SELECT SUM([Table2].[QTY]) FROM [Table2], [Table1] WHERE [Table1].[ID] = [Table2].[ID] GROUP BY [Table1].[ID]) FROM [Table1], [Table2] WHERE [Table1].[ID] = [Table2].[ID]
We have an inventory table (Items) that contains item_no and qty_on_handfields.Another table (Item_Serial) contains serial numbers for any item that hasserial numbers.If an item has 10 qty_on_hand, it should have 10 records in Item_Serial, oneunique serial number for each item.I am trying to find items where the number of serial numbers does not equalthe qty_on_hand.Here is a query I'm trying to use and, of course, it does not work:select Items.item_no, Items.qty_on_handfrom Items inner join Item_Serial on Item_Serial.item_no = Items.item_nowhere Items.qty_on_hand <count(Item_Serial.item_no)Anybody know how to do this?Thanks.
Hello,I have 2 tables, Table1 and Table2. I have copied all data from Table1to Table2.However Table1 is dynamic it has new rows added and some old rowsmodified everyday or every other day...How can I continue to keep Table2 up to date without always having tocopy everything from Table1?Basically from now on I would only like to copy new rows or modifiedrows in Table1 to Table2 and skip rows that are already present andhave not been modified in Table1. I would like to not do anything forany rows that were removed in Table1 and continue to keep a copy ofthem in Table2.Is using a DTS package the best way to automate this update of Table2to make sure Table2 is always up-to-date with Table1?Thanks for any help or advise :-)Yas
Hi,I am getting errors in the following... Is it even possible to join onCONTAINS?SELECT ListA.ContentFROM ListA LEFT OUTER JOIN ListBON CONTAINS(ListB.Content, ListA.Content)WHERE ListB.Content IS NULLThanks!
Is it possible to move rows from Table1 in Database1 to Table2 in Database2?
Say, I have Database1 containg Table1:
ID Cars --------------- 1 BMW 2 Mercedes 3 Toyota 1 Opel etc....
And Database2 containg Table2 (that is empty just at the moment): ID Cars --------------- no data added yet...
How can I copy say everything from Table1 that has ID=1 (the parameter I send in with the stored procedure at execution), and insert this in Table 2? This would be, I insert the row with the BMW thingy and the row with the Opel thingy as 2 new rows in table 2. Note that the two tables are located in 2 different databases.
I am using SQL Server 7 and am trying to implement this in a stored procedure.
