I am trying to clone a table's data structure to another table programmatically. As a start I tried to copy the schema of the table using the following query
SELECT * INTO TARGET_TABLE FROM SOURCE_TABLE WHERE 1<>1
But for my situation I specifically need the newly created table to be in a specific FILEGROUP only. something like the below
SELECT * INTO TARGET_TABLE ON [NEW_FILEGROUP] FROM SOURCE_TABLE WHERE 1<>1
I know the above line will work starting with SQL Server 2017 version. However whatsoever app I'm trying to make, should support from SQL Server 2016. What is the closest/easiest thing I can make use of in this case?
The real struggle was to get it done programmatically.
Till sql-server 2016 SP1, mentioning a filegroup in select into statement is not possible. As a work around solution, what I did to sort this out is that I've added an Unique clustered index to the newly created table. The advantage is that I can mention the filegroup while creating an index
SELECT * INTO TARGET_TABLE FROM SOURCE_TABLE WHERE 1<>1
CREATE UNIQUE CLUSTERED INDEX [target_table_clustered_idx] ON TARGET_TABLE
(
unique_column ASC
) ON [NEW_FILEGROUP]
Since this is a clustered index, the db engine will move the entire table and the index to the [NEW_FILEGROUP]. Hence solved
#Beingnin . Right click on the table then click on "Script Table as " then Click on " CREATE To " then "New Query Editor Window" Like Below Picture. then you can get
Complete script of table.
Related
I have a table (i.e. tbl_test) with 46 index and 42 keys.
I have taken backup via this command:
select *
into tbl_test_bkp_18112019
from tbl_test
But it is unable to copy index and keys in the backup table. I want to take a complete backup of the table with index and keys. Please suggest how.
Select * into - Does not copy indexes, constraints, etc.
You should generate a script from SQL server management studio by right-clicking on the desired table -> Script table as -> create to -> New query windows.
Change the table name as needed and run the script.
This will create a new table with the same structure, indexes, constraints, etc.
If you need data as well then you can insert from the orignal table to this new table using insert command
Insert newtablename select columns from oldtablename
You can Try Task > Generate Script and select only table with data and check in SQL Management Studio
I have made a table in SQL Server based on pre-existing data:
SELECT pre_existing_data
INTO new_table
FROM existing_table
I am trying to get the output to permanently sort by a particular field once the table is created. I thought this would be as simple as adding an ORDER BY clause at the end of the chunk of code that makes the table, but the data still won't sort properly.
There is no way to permanently sort a table in SQL.
You can create an index on the table and queries which use the index (in an ORDER BY clause) will be returned quicker, but the order the data is stored on the disk is not controllable.
You can create an index-organized table by using a CLUSTERED INDEX, which stores the data on disk in an ordered fashion on the clustering key. Then if you ORDER BY in your query based on the clustering key, data should come out very fast. Note that you have to use the ORDER BY in your query no matter what.
I have made a new table on SQL Server on pre-existing Schema
insert into new_table
select * from old_table
ORDER BY col ASC|DSC;
After it drop old_table and rename new table to old_table_name
drop table old_table_name;
rename new_table_name to old_table_name;
Try this trick to short your data in the table permanently
I have situation where I need to change the order of the columns/adding new columns for existing Table in SQL Server 2008.
Existing column
MemberName
MemberAddress
Member_ID(pk)
and I want this order
Member_ID(pk)
MemberName
MemberAddress
I got the answer for the same ,
Go on SQL Server → Tools → Options → Designers → Table and Database Designers and unselect Prevent saving changes that require table re-creation
2- Open table design view and that scroll your column up and down and save your changes.
It is not possible with ALTER statement. If you wish to have the columns in a specific order, you will have to create a newtable, use INSERT INTO newtable (col-x,col-a,col-b) SELECT col-x,col-a,col-b FROM oldtable to transfer the data from the oldtable to the newtable, delete the oldtable and rename the newtable to the oldtable name.
This is not necessarily recommended because it does not matter which order the columns are in the database table. When you use a SELECT statement, you can name the columns and have them returned to you in the order that you desire.
If your table doesn't have any records you can just drop then create your table.
If it has records you can do it using your SQL Server Management Studio.
Just click your table > right click > click Design then you can now arrange the order of the columns by dragging the fields on the order that you want then click save.
Best Regards
I tried this and dont see any way of doing it.
here is my approach for it.
Right click on table and Script table for Create and have this on
one of the SQL Query window,
EXEC sp_rename 'Employee', 'Employee1' -- Original table name is Employee
Execute the Employee create script, make sure you arrange the columns in the way you need.
INSERT INTO TABLE2 SELECT * FROM TABLE1.
-- Insert into Employee select Name, Company from Employee1
DROP table Employee1.
Relying on column order is generally a bad idea in SQL. SQL is based on Relational theory where order is never guaranteed - by design. You should treat all your columns and rows as having no order and then change your queries to provide the correct results:
For Columns:
Try not to use SELECT *, but instead specify the order of columns in the select list as in: SELECT Member_ID, MemberName, MemberAddress from TableName. This will guarantee order and will ease maintenance if columns get added.
For Rows:
Row order in your result set is only guaranteed if you specify the ORDER BY clause.
If no ORDER BY clause is specified the result set may differ as the Query Plan might differ or the database pages might have changed.
Hope this helps...
This can be an issue when using Source Control and automated deployments to a shared development environment. Where I work we have a very large sample DB on our development tier to work with (a subset of our production data).
Recently I did some work to remove one column from a table and then add some extra ones on the end. I then had to undo my column removal so I re-added it on the end which means the table and all references are correct in the environment but the Source Control automated deployment will no longer work because it complains about the table definition changing.
The real problem here is that the table + indexes are ~120GB and the environment only has ~60GB free so I'll need to either:
a) Rename the existing columns which are in the wrong order, add new columns in the right order, update the data then drop the old columns
OR
b) Rename the table, create a new table with the correct order, insert to the new table from the old and delete from the old as I go along
The SSMS/TFS Schema compare option of using a temp table won't work because there isn't enough room on disc to do it.
I'm not trying to say this is the best way to go about things or that column order really matters, just that I have a scenario where it is an issue and I'm sharing the options I've thought of to fix the issue
SQL query to change the id column into first:
ALTER TABLE `student` CHANGE `id` `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT FIRST;
or by using:
ALTER TABLE `student` CHANGE `id` `id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT AFTER 'column_name'
ALTER TABLE Log ADD log_id bigint IDENTITY BEFORE cust_id_fk
The above code adds a new column to last position. I want it to be added to the first position. Also I want to make it as Primary Key.
You would need to drop the table and recreate it with the columns in the correct order. If you make the table changes in SSMS then it can generate a change script for you which you could then use to deploy the change to a production server.
Even if the question is old, a more accurate about Management Studio would be required.
You can create the column manually or with Management Studio. But Management Studio will require to recreate the table and will result in a time out if you have too much data in it already, avoid unless the table is light.
To change the order of the columns you simply need to move them around in Management Studio. This should not require (Exceptions most likely exists) that Management Studio to recreate the table since it most likely change the ordination of the columns in the table definitions.
I've done it this way on numerous occasion with tables that I could not add columns with the GUI because of the data in them. Then moved the columns around with the GUI of Management Studio and simply saved them.
You will go from an assured time out to a few seconds of waiting.
In MSSMS select the table in the object explorer. Right click and select modify.
That will bring a new tab where you can drag the columns into a new default order.
Save and presto! Done.
Steps:
Rename the original table to tablename_temp
create a new table containing the new column
insert into tablename select * from tablename_temp
recreate foreign keys and other constraint on the new table
Short answer: It's not possible.
But you may try these steps:
Right click table name on object explorer
Click tasks
Click drop and create table
Add your columns in the position you want to add them
If you have data. Copy the data and paste it on an Excel spreadsheet, edit the spreadsheet to include new columns,edit top 100 rows and paste the data back into the table.
Goodluck
According to Change Column Order in a Table, this operation is not supported using the Transact-SQL statement.
You have to create another table and copy the data. But have a look at "ordinal position" and try to update it ?
SELECT
ORDINAL_POSITION
,COLUMN_NAME
,DATA_TYPE
,CHARACTER_MAXIMUM_LENGTH
,IS_NULLABLE
,COLUMN_DEFAULT
FROM
INFORMATION_SCHEMA.COLUMNS
WHERE
TABLE_NAME = 'Product'
ORDER BY
ORDINAL_POSITION ASC;
Primary key is another question for which you may find lots of answers.
I am working with SQL Server (I am a SQL Server noob) and trying to alter a table. I want to CREATE TABLE LIKE to safely store data while I drop keys and constraints and all the other rigamorole that SQL Server seems to require when altering on the original table but I have not been able to find a match to that command...
you want to recreate the same structure?
how about this
SELECT *
into test
FROM myRealTable
where 0=1
no data will be inserted into the new table
You can do
SELECT * INTO #MyTable_tmp FROM MyTable
Then modify your MyTable, and copy your data back in. Other approaches I've seen is to create a new table call it Mytable_Tmp (Not a temp table), which will be your new table.
Then copy your data doing any migrations you need. Then you will drop the original table and do a rename on Mytable.
Or you can get one of the many excellant tools that compare databases and generate difference scripts or VSTS DB Edition (Comes with developer) and you can do a diff script from a project file to a DB.
Edit
When you run SELECT * INTO #MyTable FROM MyTable, SQL Server creates a new temporary table called #MyTable that matches each column and data type from your select clause. In this case we are selecting * so it will match MyTable. This only creates the columns it doesn't copy defaults, constraints indexes or anything else.