[SQL Server] Change Schema Name Of Table In SQL Server

I want to change schema name of table Employees in Database. In the current table Employees database schema name is dbo I want to change it to exe. How can I do it ?

example:

FROM

dbo.Employees

TO

exe.Employees

I tried with this query.

ALTER SCHEMA exe TRANSFER dbo.Employees

But this give me error.
Error:
Cannot alter the schema 'exe', because it does not exist or you do not have permission.
What I missed or did wrong ?

Solution:

Create Schema :

IF (NOT EXISTS (SELECT * FROM sys.schemas WHERE name = 'exe')) 
BEGIN
    EXEC ('CREATE SCHEMA [exe] AUTHORIZATION [dbo]')
END

 

ALTER Schema :

ALTER SCHEMA exe 
    TRANSFER dbo.Employees

 

[Oracle] Enable / Disable all constraints in DB

Disable Constraints:

BEGIN

FOR c IN

(SELECT c.owner, c.table_name, c.constraint_name

FROM user_constraints c, user_tables t

WHERE c.table_name = t.table_name

AND c.status = 'ENABLED'

ORDER BY c.constraint_type DESC)

LOOP

dbms_utility.exec_ddl_statement('alter table ' || c.owner || '.' || c.table_name || ' disable constraint ' || c.constraint_name);

END LOOP;

END;

Enable Constraints:

BEGIN

FOR c IN

(SELECT c.owner, c.table_name, c.constraint_name

FROM user_constraints c, user_tables t

WHERE c.table_name = t.table_name

AND c.status = 'DISABLED'

ORDER BY c.constraint_type)

LOOP

dbms_utility.exec_ddl_statement('alter table ' || c.owner || '.' || c.table_name || ' enable constraint ' || c.constraint_name);

END LOOP;

END;

[T-SQL] Add new column [Not Null] column in a table already having data - Part 2

Previously i wrote an article with a method that how can we include not null column in a table already having data.

But that method has number of scripts to execute. SQL Server handle it in a very good way.

If you execute the script

ALTER TABLE TestTable
ADD ThirdCol INT NOT NULL DEFAULT(0)
GO

Then SQL Server will itself insert the default value 0 for the rows which are already present in database.

[T-SQL] Add new column [Not Null] column in a table already having data

This is a very simple question and asked many times, and answer is much simpler then the question.

Here is one example that we have to add a Transactiondate column into table CommissionEarned.

So here are the steps:

1. Add column without specifying not null
ALTER TABLE COMMISSIONEARNED ADD [CALCULATEDDATE] [datetime]
2. Add default constraint if its your business requirement
ALTER TABLE COMMISSIONEARNED ADD CONSTRAINT [DF_CE_CALCULATEDDATE] DEFAULT (getdate()) FOR [CALCULATEDDATE]
3. Update field with the data according to your business logic
UPDATE COMMISSIONEARNED SET CALCULATEDDATE=GETDATE()
4. Update field so that it should not entertain not null any more
ALTER TABLE COMMISSIONEARNED ALTER COLUMN [CALCULATEDDATE] [datetime] NOT NULL

Let me know for any questions