I have two database,where two table are same with all schema.
I want to move specific records of employees and employeesrates with all columns of both tables.
below is the query.
CREATE TABLE #emp
(
empID INT IDENTITY(1, 1) primary key ,
Firstname varchar(20)
);
CREATE TABLE #empRates
(
ID INT IDENTITY(1, 1) primary key ,
empid int, -- foreign key from #emp
rate decimal(10,3),
startdate datetime,
enddate datetime,
);
insert into #emp (firstname) values('First')
insert into #emp (firstname) values('Second')
insert into #emp (firstname) values('Third')
insert into #empRates(empid,rate,startdate,enddate) values(1,10,'2020/01/10','2020/01/20')
insert into #empRates(empid,rate,startdate,enddate) values(1,15,'2020/01/20','2020/01/30')
insert into #empRates(empid,rate,startdate,enddate) values(2,10,'2020/01/10','2020/01/20')
insert into #empRates(empid,rate,startdate,enddate) values(3,15,'2020/01/20','2020/01/30')
select * from #emp
select * from #empRates
drop table #emp
drop table #empRates
Here both database on same server. Database1 and Database2.
below my query which tried.
insert into database2..empRates(empid,rate,startdate,enddate) select empid,rate,startdate,enddate
from database1..empRates
Here my problem is both database have different records,so identity are different,so after insert other employee rates get displayed for another like mashed up.
I am using sql server 2012.
can you please provide the way.
You should take a look at this post --> How to turn IDENTITY_INSERT on and off using SQL Server 2008?
This way you can specify value for id column during insert, so rows on destination databases will keep IDs from origin.
Hope it helps!
Related
I have 3 types of tables
Major table as follows
CREATE TABLE #InitialTable
(
Id int PRIMARY KEY IDENTITY(1,1),
RP varchar(20)
)
INSERT INTO #InitialTable
VALUES ('R1', 'R2', 'R3')
GO
Table contains dynamically created tables information as follows
CREATE TABLE #DynamicTablesInfo
(
Id int PRIMARY KEY IDENTITY(1,1),
RPId int FOREIGN KEY REFERENCES #InitialTable(Id),
TableName varchar(100)
)
GO
INSERT INTO #DynamicTablesInfo
VALUES (1, 'Table_X1'), (2, 'Table_X2'), (3, 'Table_X3')
GO
Dynamically created tables these tables can be any number of tables and the tables info is available in above table.
CREATE TABLE #Table_X1
(
Id int PRIMARY KEY IDENTITY,
Version_Value varchar(100)
)
GO
INSERT INTO #Table_X1
VALUES ('Val_X1_1'), ('Val_X1_2'), ('Val_X1_3')
GO
CREATE TABLE #Table_X2
(
Id int PRIMARY KEY IDENTITY,
Version_Value varchar(100)
)
GO
INSERT INTO #Table_X2
VALUES ('Val_X2_1'), ('Val_X2_2'), ('Val_X2_3')
GO
CREATE TABLE #Table_X3
(
Id int PRIMARY KEY IDENTITY,
Version_Value varchar(100)
)
GO
INSERT INTO #Table_X3
VALUES ('Val_X3_1'), ('Val_X3_2'), ('Val_X3_3')
GO
Now I wanted to join InitialTable with dynamically created tables (Table_X1, Table_X2, Table_X3,....) with the help of DynamicTablesInfo table - how to do that?
Note: for easy update, delete, insert I created them as temporary tables but in my application all are real tables.
Instead of doing this:
CREATE TABLE #Table_X1
(
Id int PRIMARY KEY IDENTITY
,Version_Value varchar(100)
)
GO
CREATE TABLE #Table_X2
(
Id int PRIMARY KEY IDENTITY
,Version_Value varchar(100)
)
GO
CREATE TABLE #Table_X3
(
Id int PRIMARY KEY IDENTITY
,Version_Value varchar(100)
)
GO
Do this one time:
CREATE TABLE Table_X
(
Id int PRIMARY KEY IDENTITY
,Version_Value varchar(100)
,X_number INT
)
GO
Then instead of doing this:
INSERT INTO #Table_X1 VALUES ('Val_X1_1'),('Val_X1_2'),('Val_X1_3')
INSERT INTO #Table_X2 VALUES ('Val_X2_1'),('Val_X2_2'),('Val_X2_3')
INSERT INTO #Table_X3 VALUES ('Val_X3_1'),('Val_X3_2'),('Val_X3_3')
Do this:
INSERT INTO Table_X VALUES ('Val_X1_1',1),('Val_X1_2',1),('Val_X1_3',1)
INSERT INTO Table_X VALUES ('Val_X2_1',2),('Val_X2_2',2),('Val_X2_3',2)
INSERT INTO Table_X VALUES ('Val_X3_1',3),('Val_X3_2',3),('Val_X3_3',3)
Much easier to query without dynamics:
--no
SELECT * FROM Table_X1
--yes
SELECY * FROM Table_X WHERE X_Number = 1
You've indicated you're stuck with it how it is, so you'll need to create and run your queries dynamically too. This is c#/vb flavored pseudocode:
string sql = "SELECT * FROM sometable"
for int x = 1 to 3
sql = sql + " table_x{x} on sometable.id = table_x{x}.id"
Or perhaps build a Union:
string sql = "WITH allx AS (SELECT * FROM table_x1"
for int x = 2 to 10
sql = sql + " UNION ALL SELECT * FROM table_x{x}"
sql = sql + ") select * from sometable inner join allx on..."
But I echo larnu's sentiments in the comments.. if you truly cannot change the tables that are created, consider creating a VIEW in a similar way to the UNION code above, that will sit alongside X number of tables and will provide a way to query without dynamic:
CREATE VIEW AllX AS(
SELECT x.*, 1 as Which FROM TABLE_X1 x
UNION ALL SELECT x.*, 2 as Which FROM TABLE_X2 x
UNION ALL SELECT x.*, 3 as Which FROM TABLE_X3 x
...
Use the same technique that creates 10 tables to string together a CREATE VIEW statement that views over the 10 tables, then you can query the view without Dynamic sql generation
If I run the following select statement inside an insert trigger, is it possible that it will return more than one result?:
DECLARE #variable char(1) = (SELECT ID FROM inserted)
If so, then what's the best to handle it?
Here is the problem that I am trying to solve: Every time when the new record is inserted into a table, I want to take the newly inserted ID and insert it into another table(if it doesn't exists).
Thank you!
Instead of
DECLARE #variable char(1) = (SELECT ID FROM inserted)
You can do something like following:
Declare #VarTempTbl as table (id int)
Insert into #VarTempTbl (id)
Select id from inserted
So that you can get those values for further processing
Now, I had created Two tables One for Master table and another for When any Insertion happens in that Master table, that entry has to inserted into the another table.
CREATE TABLE tblEmployee
(
Id int Primary Key,
Name nvarchar(30),
Gender nvarchar(10),
DepartmentId int
)
CREATE TABLE tblEmployee_New
(
Id int Primary Key,
Name nvarchar(30),
Gender nvarchar(10),
DepartmentId int
)
Trigger:
CREATE TRIGGER TR_EMPLOYEEDETAILS_AFTEROFINSERT
ON TBLEMPLOYEE
AFTER INSERT
AS
BEGIN
TRUNCATE TABLE tblEmployee_New
INSERT INTO TBLEMPLOYEE_NEW(ID, NAME, GENDER, DEPARTMENTID)
SELECT ID, NAME, GENDER, DEPARTMENTID
FROM INSERTED
END
Now Lets try to insert into record into a master table
Insert into tblEmployee values (1,'John', 'Male', 3)
Insert into tblEmployee values (2,'Mike', 'Male', 2)
It has automatically insert the newly inserted records into the another table.
If your want to remove the Previous records then add a drop Statement in that above Trigger.
Note: You can also use #Temp Table instead of creating a another table('tblEmployee_New')
Kinldy Share your comments
I am performing bulk insert on a table in sql server 2012, at the same time i am picking the last inserted row with max() function and inserting it into another table , how to perform this when my table is getting data from multiple sources because while performing insertion into secondary table there is time delay while insertions are still happening in primary table so next time max() will pick up last updated row and i will loose some rows which are not max() but still inserted into primary table meanwhile.
create table dbo.emp
(
id int primary key identity(1,1),
emp_id int,
name varchar(255),
address varchar(255)
)
create table dbo.empx
(
id int primary key,
emp_id int foreign key references dbo.emp(id),
)
declare #temp int ;
set #temp=1;
while #temp<1000
begin
insert into dbo.emp(emp_id,name,address)values (100+#temp,'Ename'+LTRIM(STR(#temp)),'123 Sample Address'+LTRIM(STR(#temp)));
set #temp=#temp+1;
insert into dbo.empx select max(dbo.emp.id),max(dbo.emp.emp_id) from dbo.emp
end
Use OUTPUT Clause...
CREATE TABLE #empx
(Id INT ,emp_id VARCHAR(50))
DECLARE #temp INT ;
SET #temp=1;
WHILE #temp<1000
BEGIN
INSERT INTO dbo.emp(emp_id,name,address)
OUTPUT INSERTED.Id,INSERTED.emp_id INTO #empx(Id,emp_id)
VALUES (100+#temp,'Ename'+LTRIM(STR(#temp)),'123 Sample Address'+LTRIM(STR(#temp)));
SET #temp=#temp+1;
END
INSERT INTO dbo.empx(Id,emp_id)
SELECT Id,emp_id FROM #empx
Or Use a trigger
CREATE TRIGGER EmpLog
ON dbo.emp
AFTER Insert
AS
BEGIN
SET NOCOUNT ON;
Insert into dbo.empx (id,emp_id) Select id,emp_id from inserted;
END
GO
Probably there is already answer for it, but i couldn't find it... So i have 2 tables and data in third one. Lets name them (Source, Target and UpdateTarget).
I need to insert records from Source to Target, then grab autoincremented IDs from Target and update UpdateTarget table with these IDs based on filters from Source table. I've tried to use OUTPUT, but it gives me an error:
The multi-part identifier "s.EmployeeID" could not be bound.
Here is my current SQL query:
CREATE TABLE dbo.target
(
id INT IDENTITY(1,1) PRIMARY KEY,
employee VARCHAR(32)
);
CREATE TABLE dbo.source
(
id INT IDENTITY(1,1) PRIMARY KEY,
employee VARCHAR(32),
EmployeeID int
);
CREATE TABLE dbo.updateTarget
(
id INT IDENTITY(1,1) PRIMARY KEY,
ExternalID int
);
DECLARE #MyTableVar TABLE
(
id INT,
EmployeeID int
);
INSERT dbo.target (employee)
OUTPUT
inserted.id, -- autoincremented ID
s.EmployeeID -- here i got an error
INTO #MyTableVar
SELECT s.employee
FROM dbo.source AS s
UPDATE dbo.updateTarget
SET ExternalID = data.ID
FROM #MyTableVar data
WHERE updateTarget.ID = data.EmployeeID
DROP TABLE source
DROP TABLE target
DROP TABLE updateTarget
I don't have EmployeeID column in target table.
Is there a way to achieve it without making two queries for each record? Or can you point me to existing answer if there are any?
Thanks!
1) INSERT INTO table variable generated id, and EmployeeId for usage in update
2) MERGE instead of INSERT (it allows to get column EmployeeId from SRC)
3) OUTPUT result, action inserted, getting id from TGT and EmployeeId
INSERT INTO #MyTableVar(id, EmployeeId)
SELECT id, EmployeeId
FROM (
MERGE dbo.target TGT
USING dbo.source SRC
ON TGT.employee = SRC.employee
WHEN NOT MATCHED THEN
INSERT (employee)
VALUES (src.employee)
OUTPUT inserted.id, SRC.EmployeeId)
AS out(id, EmployeeId);;
MERGE gives better OUTPUT options
I'm writing a SQL script to generate test data for our database. I'm generating the data in table variables (so I can track it later) and then inserting it into the real tables. The problem is, I need to track which rows I've added to the parent table, so that I can generate its child data later on in the script. For example:
CREATE TABLE Customer (
CustomerId INT IDENTITY,
Name VARCHAR(50)
)
CREATE TABLE Order (
OrderId INT IDENTITY,
CustomerId INT,
Product VARCHAR(50)
)
So, in my script, I create equivalent table variables:
DECLARE #Customer TABLE (
CustomerId INT IDENTITY,
Name VARCHAR(50)
) -- populate customers
DECLARE #Order TABLE (
OrderId INT IDENTITY,
CustomerId INT,
Product VARCHAR(50)
) -- populate orders
And I generate and insert sample data into each table variable.
Now, when I go to insert customers from my table variable into the real table, the CustomerId column in the table variable will become meaningless, as the real table has its own identity seed for its CustomerId column.
Is there a way I can track the new identity of each row inserted into the real table, in my table variable, so I can use a proper CustomerId for the order records? Or, is there a better way I should be going about this?
(Note: I originally started with an application to generate the test data, but it ran too slow during insert as > 1,000,000 records need to be generated.)
WHy do you need identity values on the table variables? If you use just int, you can isnert the ids after the insert is done. Grab them using the output clause. YOu might need an input values and an output values table varaiable to get this just right like this:
DECLARE #CustomerInputs TABLE (Name VARCHAR(50) )
DECLARE #CustomerOutputs TABLE (CustomerId INT ,Name VARCHAR(50) )
INSERT INTO CUSTOMERS (name)
OUTPUT inserted.Customerid, inserted.Name INTO #CustomerOutputs
SELECT Name FROM #CustomerInputs
SELECT * from #CustomerOutputs
You can insert the data to the table with a cursor and use the built-in function SCOPE_IDENTITY() to get the last id which was inserted in the current scope (by your script).
See this MSDN article for more information on SCOPE_IDENTITY.
Here is one way of doing it. If you can use it depends on your situation. You should not do it in production environment when users use your db.
-- Get the next identity values for Customer and Order
declare #NextCustomerID int
declare #NextOrderID int
set #NextCustomerID = IDENT_CURRENT('Customer')+1
set #NextOrderID = IDENT_CURRENT('Order')+1
-- Create tmp tables
create table #Customer (CustomerID int identity, Name varchar(50))
create table #Order (OrderID int identity, CustomerID int, Product varchar(50))
-- Reseed the identity columns in temp tables
dbcc checkident(#Customer, reseed, #NextCustomerID)
dbcc checkident(#Order, reseed, #NextOrderID)
-- Populate #Customer
-- Populate #Order
-- Allow insert to identity column on Customer
set identity_insert Customer on
-- Add rows to Customer
insert into Customer(CustomerId, Name)
select CustomerID, Name
from #Customer
-- Restore identity functionality on Customer
set identity_insert Customer off
-- Add rows to Order
set identity_insert [Order] on
insert into [Order](OrderID, CustomerID, Product)
select OrderID, CustomerID, Product
from #Order
set identity_insert [Order] off
-- Drop temp tables
drop table #Customer
drop table #Order
-- Check result
select * from [Order]
select * from Customer
The way I'd do it its first obtain the MAX(CustomerId) from your Customer Table. Then I'd get rid of the IDENTITY column on your variable table and do my own CustomerId using ROW_NUMBER() and the MaxCustomerId. It should be something like this:
DECLARE #MaxCustomerId INT
SELECT #MaxCustomerId = ISNULL(MAX(CustomerId),0)
FROM Customer
DECLARE #Customer TABLE (
CustomerId INT,
Name VARCHAR(50)
)
INSERT INTO #Customer(CustomerId, Name)
SELECT #MaxCustomerId + ROW_NUMBER() OVER(ORDER BY SomeColumn), Name
FROM YourDataTable
Or insert the values on a temp table, so you can use the same ids to fill your Order table.