I have three tables:
Role
Permission
RolePermission (link table with just role id and permissionid)
I have a stored procedure that updates role
If I am passing permissionids associated with the role to the update stored procedure, I can use the function [dbo.Split][1] to split them good.
But after that how can I update rolepermission table?
Do I need to loop? And if so: how?
One possible way you could do this (lacking detailed information about your data - so guessing at times) would be:
BULK INSERT your CSV file into a temporary table, so you have both RoleID's and Permission ID's available (guessing that you have both in the CSV)
then use a transaction and several T-SQL statements to put the data into the proper places.
Step 1: BULK INSERT
You would need to use BULK INSERT to get your data into a temporary table:
CREATE TABLE #BulkImportTemp (RoleID INT, PermissionID INT)
BULK INSERT #BulkImportTemp
FROM 'c:\yourcsvfile.csv'
WITH
(FIELDTERMINATOR = ',',
ROWTERMINATOR = '\n')
GO
SELECT * FROM #BulkImportTemp
Step 2: update the necessary tables
Now, once you have all that data in a temporary table, you can update the necessary tables:
START TRANSACTION
UPDATE dbo.Role
SET .......
FROM #BulkImportTemp tmp
WHERE ........
UPDATE dbo.Permission
SET .......
FROM #BulkImportTemp tmp
WHERE ........
INSERT INTO dbo.RolePermission(....)
SELECT ........
FROM #BulkImportTemp tmp
WHERE ........
COMMIT
UPDATE [ROLE] SET
ProductId=#ProductId,
[Name]=#Name
WHERE RoleId=#RoleId
DELETE FROM RolePermission WHERE RoleId=#RoleId
INSERT INTO RolePermission
SELECT #RoleId, P.Items
FROM dbo.Split(#PermisionIds, ',') P
Related
My database contains three tables called Object_Table, Data_Table and Link_Table. The link table just contains two columns, the identity of an object record and an identity of a data record.
I want to copy the data from DATA_TABLE where it is linked to one given object identity and insert corresponding records into Data_Table and Link_Table for a different given object identity.
I can do this by selecting into a table variable and the looping through doing two inserts for each iteration.
Is this the best way to do it?
Edit : I want to avoid a loop for two reason, the first is that I'm lazy and a loop/temp table requires more code, more code means more places to make a mistake and the second reason is a concern about performance.
I can copy all the data in one insert but how do get the link table to link to the new data records where each record has a new id?
In one statement: No.
In one transaction: Yes
BEGIN TRANSACTION
DECLARE #DataID int;
INSERT INTO DataTable (Column1 ...) VALUES (....);
SELECT #DataID = scope_identity();
INSERT INTO LinkTable VALUES (#ObjectID, #DataID);
COMMIT
The good news is that the above code is also guaranteed to be atomic, and can be sent to the server from a client application with one sql string in a single function call as if it were one statement. You could also apply a trigger to one table to get the effect of a single insert. However, it's ultimately still two statements and you probably don't want to run the trigger for every insert.
You still need two INSERT statements, but it sounds like you want to get the IDENTITY from the first insert and use it in the second, in which case, you might want to look into OUTPUT or OUTPUT INTO: http://msdn.microsoft.com/en-us/library/ms177564.aspx
The following sets up the situation I had, using table variables.
DECLARE #Object_Table TABLE
(
Id INT NOT NULL PRIMARY KEY
)
DECLARE #Link_Table TABLE
(
ObjectId INT NOT NULL,
DataId INT NOT NULL
)
DECLARE #Data_Table TABLE
(
Id INT NOT NULL Identity(1,1),
Data VARCHAR(50) NOT NULL
)
-- create two objects '1' and '2'
INSERT INTO #Object_Table (Id) VALUES (1)
INSERT INTO #Object_Table (Id) VALUES (2)
-- create some data
INSERT INTO #Data_Table (Data) VALUES ('Data One')
INSERT INTO #Data_Table (Data) VALUES ('Data Two')
-- link all data to first object
INSERT INTO #Link_Table (ObjectId, DataId)
SELECT Objects.Id, Data.Id
FROM #Object_Table AS Objects, #Data_Table AS Data
WHERE Objects.Id = 1
Thanks to another answer that pointed me towards the OUTPUT clause I can demonstrate a solution:
-- now I want to copy the data from from object 1 to object 2 without looping
INSERT INTO #Data_Table (Data)
OUTPUT 2, INSERTED.Id INTO #Link_Table (ObjectId, DataId)
SELECT Data.Data
FROM #Data_Table AS Data INNER JOIN #Link_Table AS Link ON Data.Id = Link.DataId
INNER JOIN #Object_Table AS Objects ON Link.ObjectId = Objects.Id
WHERE Objects.Id = 1
It turns out however that it is not that simple in real life because of the following error
the OUTPUT INTO clause cannot be on
either side of a (primary key, foreign
key) relationship
I can still OUTPUT INTO a temp table and then finish with normal insert. So I can avoid my loop but I cannot avoid the temp table.
I want to stress on using
SET XACT_ABORT ON;
for the MSSQL transaction with multiple sql statements.
See: https://msdn.microsoft.com/en-us/library/ms188792.aspx
They provide a very good example.
So, the final code should look like the following:
SET XACT_ABORT ON;
BEGIN TRANSACTION
DECLARE #DataID int;
INSERT INTO DataTable (Column1 ...) VALUES (....);
SELECT #DataID = scope_identity();
INSERT INTO LinkTable VALUES (#ObjectID, #DataID);
COMMIT
It sounds like the Link table captures the many:many relationship between the Object table and Data table.
My suggestion is to use a stored procedure to manage the transactions. When you want to insert to the Object or Data table perform your inserts, get the new IDs and insert them to the Link table.
This allows all of your logic to remain encapsulated in one easy to call sproc.
If you want the actions to be more or less atomic, I would make sure to wrap them in a transaction. That way you can be sure both happened or both didn't happen as needed.
You might create a View selecting the column names required by your insert statement, add an INSTEAD OF INSERT Trigger, and insert into this view.
Before being able to do a multitable insert in Oracle, you could use a trick involving an insert into a view that had an INSTEAD OF trigger defined on it to perform the inserts. Can this be done in SQL Server?
Insert can only operate on one table at a time. Multiple Inserts have to have multiple statements.
I don't know that you need to do the looping through a table variable - can't you just use a mass insert into one table, then the mass insert into the other?
By the way - I am guessing you mean copy the data from Object_Table; otherwise the question does not make sense.
//if you want to insert the same as first table
$qry = "INSERT INTO table (one, two, three) VALUES('$one','$two','$three')";
$result = #mysql_query($qry);
$qry2 = "INSERT INTO table2 (one,two, three) VVALUES('$one','$two','$three')";
$result = #mysql_query($qry2);
//or if you want to insert certain parts of table one
$qry = "INSERT INTO table (one, two, three) VALUES('$one','$two','$three')";
$result = #mysql_query($qry);
$qry2 = "INSERT INTO table2 (two) VALUES('$two')";
$result = #mysql_query($qry2);
//i know it looks too good to be right, but it works and you can keep adding query's just change the
"$qry"-number and number in #mysql_query($qry"")
I have 17 tables this has worked in.
-- ================================================
-- Template generated from Template Explorer using:
-- Create Procedure (New Menu).SQL
--
-- Use the Specify Values for Template Parameters
-- command (Ctrl-Shift-M) to fill in the parameter
-- values below.
--
-- This block of comments will not be included in
-- the definition of the procedure.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE InsetIntoTwoTable
(
#name nvarchar(50),
#Email nvarchar(50)
)
AS
BEGIN
SET NOCOUNT ON;
insert into dbo.info(name) values (#name)
insert into dbo.login(Email) values (#Email)
END
GO
I want to create notification application in node js and I just created a database with these three tables in SQL Server:
tbluser
user_id
user_name
tbluser_notification
user_id
noti_id
read
tblnotification
noti_id
noti_title
noti_mesg
noti_create
noti_sender_id
My question is: whenever I insert a notification into tblnotification, I want to insert a record for each user into the tbluser_notification.
Create after insert trigger
CREATE TRIGGER [dbo].[trgtblnotificationInsert]
ON [dbo].[tblnotification]
AFTER INSERT
AS
BEGIN
SET NOCOUNT ON;
INSERT INTO tbluser_notification (user_id, noti_id, notificationread)
SELECT tbluser.user_id, inserted.noti_id, 0
FROM tbluser
CROSS JOIN inserted
END
Please note: I have changed the column name 'read' to 'notificationread' as read is reserved word.
I have a database in which all the tables have column named ID. I need to alter all tables in database and add identity to these columns. Is it possible with some query ? Or do I have to do it manually?
Thank you very much.
Unfortunately in SQL Server you cannot add identity property to existing columns. You need to drop an existing one, then create new with this property. You can automate this task by quering system tables and using dynamic sql. But if you already have some data in ID column this will make things more tricky because you need to preserve existing data.
Here is a script for a single table, automating this for all tables in database using dynamic sql will be kinda tricky...
Table Test_table has 2 columns: id and val.
-- Move data to temp storage
SELECT ID,
VAL
INTO #temp_table
FROM dbo.test_table
-- Remove data from original table
DELETE
FROM dbo.test_table
-- Drop and Create ID column
ALTER TABLE dbo.test_table
DROP COLUMN ID
ALTER TABLE dbo.test_table
ADD ID int IDENTITY(1,1)
-- Move data back to original table
SET IDENTITY_INSERT dbo.test_table ON
INSERT INTO dbo.test_table (ID, VAL)
SELECT ID, VAL
FROM #temp_table
DECLARE #MaxID int
SELECT #MaxID = MAX(ID) + 1
FROM dbo.test_table
SET IDENTITY_INSERT dbo.test_table OFF
-- Reseed IDENTITY property
DBCC CHECKIDENT ('dbo.test_table', RESEED, #MaxID)
There is no way to do this for all tables. Here's what I'd do: Use T-SQL to generate a (big) script that performs all the changes, then manually run that script.
You can add the identity property to existing columns without data movement using SWITCH.
Need to read CSV file information one by one. i.e. If the customer in the file is existing in Customer table insert into detail table otherwise insert into error table. So I can't use bulk insert method.
How to read one by one record from CSV file? How to give the path?
Bulk insert method is not going to work here.
One option is to use an INSTEAD OF INSERT trigger to selectively put the row in the correct table, and then use your normal BULK INSERT with the option FIRE_TRIGGERS.
Something close to;
CREATE TRIGGER bop ON MyTable INSTEAD OF INSERT AS
BEGIN
INSERT INTO MyTable
SELECT inserted.id,inserted.name,inserted.otherfield FROM inserted
WHERE inserted.id IN (SELECT id FROM customerTable);
INSERT INTO ErrorTable
SELECT inserted.id,inserted.name,inserted.otherfield FROM inserted
WHERE inserted.id NOT IN (SELECT id FROM customerTable);
END;
BULK INSERT MyTable FROM 'c:\temp\test.sql'
WITH (FIELDTERMINATOR=',', FIRE_TRIGGERS);
DROP TRIGGER bop;
If you're importing files regularly, you can create a table (ImportTable) with the same schema, set the trigger on that and do the imports to MyTable through bulk import to ImportTable. That way you can keep the trigger and as long as you're importing to ImportTable, you don't need to do any special setup/procedure for each import.
CREATE TABLE #ImportData
(
CVECount varchar(MAX),
ContentVulnCVE varchar(MAX),
ContentVulnCheckName varchar(MAX)
)
BULK INSERT #ImportData
FROM 'D:\test.csv'
WITH
(
FIRSTROW = 2,
FIELDTERMINATOR = ',', --CSV field delimiter
ROWTERMINATOR = '\n', --Use to shift the control to next row
TABLOCK
)
select * from #ImportData
//Here you can write your script to user read data one by one
DROP TABLE #ImportData
Use bulk insert to load into a staging table and then process it line by line.
My database contains three tables called Object_Table, Data_Table and Link_Table. The link table just contains two columns, the identity of an object record and an identity of a data record.
I want to copy the data from DATA_TABLE where it is linked to one given object identity and insert corresponding records into Data_Table and Link_Table for a different given object identity.
I can do this by selecting into a table variable and the looping through doing two inserts for each iteration.
Is this the best way to do it?
Edit : I want to avoid a loop for two reason, the first is that I'm lazy and a loop/temp table requires more code, more code means more places to make a mistake and the second reason is a concern about performance.
I can copy all the data in one insert but how do get the link table to link to the new data records where each record has a new id?
In one statement: No.
In one transaction: Yes
BEGIN TRANSACTION
DECLARE #DataID int;
INSERT INTO DataTable (Column1 ...) VALUES (....);
SELECT #DataID = scope_identity();
INSERT INTO LinkTable VALUES (#ObjectID, #DataID);
COMMIT
The good news is that the above code is also guaranteed to be atomic, and can be sent to the server from a client application with one sql string in a single function call as if it were one statement. You could also apply a trigger to one table to get the effect of a single insert. However, it's ultimately still two statements and you probably don't want to run the trigger for every insert.
You still need two INSERT statements, but it sounds like you want to get the IDENTITY from the first insert and use it in the second, in which case, you might want to look into OUTPUT or OUTPUT INTO: http://msdn.microsoft.com/en-us/library/ms177564.aspx
The following sets up the situation I had, using table variables.
DECLARE #Object_Table TABLE
(
Id INT NOT NULL PRIMARY KEY
)
DECLARE #Link_Table TABLE
(
ObjectId INT NOT NULL,
DataId INT NOT NULL
)
DECLARE #Data_Table TABLE
(
Id INT NOT NULL Identity(1,1),
Data VARCHAR(50) NOT NULL
)
-- create two objects '1' and '2'
INSERT INTO #Object_Table (Id) VALUES (1)
INSERT INTO #Object_Table (Id) VALUES (2)
-- create some data
INSERT INTO #Data_Table (Data) VALUES ('Data One')
INSERT INTO #Data_Table (Data) VALUES ('Data Two')
-- link all data to first object
INSERT INTO #Link_Table (ObjectId, DataId)
SELECT Objects.Id, Data.Id
FROM #Object_Table AS Objects, #Data_Table AS Data
WHERE Objects.Id = 1
Thanks to another answer that pointed me towards the OUTPUT clause I can demonstrate a solution:
-- now I want to copy the data from from object 1 to object 2 without looping
INSERT INTO #Data_Table (Data)
OUTPUT 2, INSERTED.Id INTO #Link_Table (ObjectId, DataId)
SELECT Data.Data
FROM #Data_Table AS Data INNER JOIN #Link_Table AS Link ON Data.Id = Link.DataId
INNER JOIN #Object_Table AS Objects ON Link.ObjectId = Objects.Id
WHERE Objects.Id = 1
It turns out however that it is not that simple in real life because of the following error
the OUTPUT INTO clause cannot be on
either side of a (primary key, foreign
key) relationship
I can still OUTPUT INTO a temp table and then finish with normal insert. So I can avoid my loop but I cannot avoid the temp table.
I want to stress on using
SET XACT_ABORT ON;
for the MSSQL transaction with multiple sql statements.
See: https://msdn.microsoft.com/en-us/library/ms188792.aspx
They provide a very good example.
So, the final code should look like the following:
SET XACT_ABORT ON;
BEGIN TRANSACTION
DECLARE #DataID int;
INSERT INTO DataTable (Column1 ...) VALUES (....);
SELECT #DataID = scope_identity();
INSERT INTO LinkTable VALUES (#ObjectID, #DataID);
COMMIT
It sounds like the Link table captures the many:many relationship between the Object table and Data table.
My suggestion is to use a stored procedure to manage the transactions. When you want to insert to the Object or Data table perform your inserts, get the new IDs and insert them to the Link table.
This allows all of your logic to remain encapsulated in one easy to call sproc.
If you want the actions to be more or less atomic, I would make sure to wrap them in a transaction. That way you can be sure both happened or both didn't happen as needed.
You might create a View selecting the column names required by your insert statement, add an INSTEAD OF INSERT Trigger, and insert into this view.
Before being able to do a multitable insert in Oracle, you could use a trick involving an insert into a view that had an INSTEAD OF trigger defined on it to perform the inserts. Can this be done in SQL Server?
Insert can only operate on one table at a time. Multiple Inserts have to have multiple statements.
I don't know that you need to do the looping through a table variable - can't you just use a mass insert into one table, then the mass insert into the other?
By the way - I am guessing you mean copy the data from Object_Table; otherwise the question does not make sense.
//if you want to insert the same as first table
$qry = "INSERT INTO table (one, two, three) VALUES('$one','$two','$three')";
$result = #mysql_query($qry);
$qry2 = "INSERT INTO table2 (one,two, three) VVALUES('$one','$two','$three')";
$result = #mysql_query($qry2);
//or if you want to insert certain parts of table one
$qry = "INSERT INTO table (one, two, three) VALUES('$one','$two','$three')";
$result = #mysql_query($qry);
$qry2 = "INSERT INTO table2 (two) VALUES('$two')";
$result = #mysql_query($qry2);
//i know it looks too good to be right, but it works and you can keep adding query's just change the
"$qry"-number and number in #mysql_query($qry"")
I have 17 tables this has worked in.
-- ================================================
-- Template generated from Template Explorer using:
-- Create Procedure (New Menu).SQL
--
-- Use the Specify Values for Template Parameters
-- command (Ctrl-Shift-M) to fill in the parameter
-- values below.
--
-- This block of comments will not be included in
-- the definition of the procedure.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE InsetIntoTwoTable
(
#name nvarchar(50),
#Email nvarchar(50)
)
AS
BEGIN
SET NOCOUNT ON;
insert into dbo.info(name) values (#name)
insert into dbo.login(Email) values (#Email)
END
GO