How to Use Computed Column in SQL Server Databases with Computed-Column Samples
A computed column can be defined as an expression which can use other columns in the same table as well as using other table values via user-defined functions. And when you alter the sql function with tables names in two part format including the schema name and "WITH SCHEMABINDING" hint, this time the function will not be able for use in an expression of a persisted column
ALTER TABLE attempt failed, this explaination came through perfectly, tatero Log In or Register to post comments Preeti (not verified) on May 13, 2004 This is a very systematic solution given to a problem ususlly faced while migrating from Oracle to SQL 2000. To demonstrate this T-SQL activity, run the code that Listing 1 shows to create and populate the Orders2 and OrderDetails2 tables in the Northwind database
SQL Drop Column - ALTER TABLE DROP COLUMN failed because one or more objects access this column
There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within REPLACE functions). Answer: Hi esak2000; In order to do what you want you will need to create a new DataTable object with all the columns you wish to include from the two original DataTable's
But do you know what will be the solution when ID column is referenced as foreign key in other multiple tables? because in this case it wouldnt let me delete that old ID column. can i chaneg the order of columns in a table as i dont want to disturb the column sequence of my primary key column after using the above suggested methods
The replication of schema changes is activated, and the replication has been running for years, including frequent schema changes (new column, new constraints, etc)
Alter Table Alter Column
Also, be aware that this will update all the rows in the table unless yo use a WHERE clause Reply to this comment Home Tuning Services Featured Articles How to cache stored procedure results using a hash key There are a lot of different design patterns that lend themselves to creating SQL Server Database Optimization Guide In the troubleshooting guide we went over the different physical bottlenecks that can Yet Another Temp Tables Vs Table Variables Article The debate whether to use temp tables or table variables is an old Using Union Instead of OR Sometimes slow queries can be rectified by changing the query around a bit
sql server 2008 - Alter table column for primary key and identity - Stack Overflow
You have to create a new column with the IDENTITY property: ALTER TABLE MyTable ADD NewID int IDENTITY(1,1) not null Unfortunately, you're not then able to assign the old ID values to this new column
ALTER TABLE only allows columns to be added that can contain nulls, or have a DEFAULT definition specified, or the column being added is an identity or timestamp column, or alternatively if none of the previous conditions are satisfied the table must be empty to allow addition of this column. Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account
Alter Table Add Column
Create Table Dynamically Drop Table Constraints Add Column Constraint Rename Column Using ALTER INDEX Find Column in All Databases Post a comment Comments (RSS) Trackback Permalink Click here to cancel reply. Reply to this comment najib 25 Jun 2014 at 11:09 am ok i found this info here usefull and simple to understand thank you Reply to this comment Home Tuning Services Featured Articles How to cache stored procedure results using a hash key There are a lot of different design patterns that lend themselves to creating SQL Server Database Optimization Guide In the troubleshooting guide we went over the different physical bottlenecks that can Yet Another Temp Tables Vs Table Variables Article The debate whether to use temp tables or table variables is an old Using Union Instead of OR Sometimes slow queries can be rectified by changing the query around a bit
alter table abc ADD dad varchar(50) after parentname But it throws me the following error message Msg 170, Level 15, State 1, Line 1 Line 1: Incorrect syntax near 'after'. If you look at a page of data (for example, by using DBCC PAGE in MSSQL) you will see that the storage order of the fields does not correspond to the order you specified in the CREATE TABLE statement
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