SQLPRO FOR MSSQL KEY UPDATE

The steps to update the product key is very simple. Here is how the CPU utilization looks on the server. Once the product key got updated successfully, SQL Server was able to use all the core of the box. So, I updated the SQL Server Edition from “Server+CAL” to “CORE” model. I started wondering why SQL Server is using the just 20 logical CPUs then I found that we were using enterprise edition with “Server+CAL” licensing model. When I checked the box to know how many CPU the box got, it surprised me because it got 224 logical cores. When I started ramping-up more and more workload on the server, I found the SQL Server was using only 20 CPUs. , CONSTRAINT PK_TransactionHistoryArchive1_CustomerID PRIMARY KEY NONCLUSTERED (CustomerID)ĬREATE CLUSTERED INDEX CIX_TransactionID ON Production.Yesterday, I was doing SQL Server Database stress and benchmarking testing on the client side. , TransactionID int IDENTITY (1,1) NOT NULL Create table to add the clustered indexĬREATE TABLE Production.TransactionHistoryArchive1ĬustomerID uniqueidentifier DEFAULT NEWSEQUENTIALID() The following example creates a table and defines a primary key on the column CustomerID and a clustered index on TransactionID in the AdventureWorks database. , CONSTRAINT PK_TransactionHistoryArchive1_TransactionID PRIMARY KEY CLUSTERED (TransactionID)Ĭreate a primary key with clustered index in a new table TransactionID int IDENTITY (1,1) NOT NULL CREATE TABLE Production.TransactionHistoryArchive1 The following example creates a table and defines a primary key on the column TransactionID in the AdventureWorks database. ALTER TABLE Production.TransactionHistoryArchiveĪDD CONSTRAINT PK_TransactionHistoryArchive_TransactionID PRIMARY KEY CLUSTERED (TransactionID) The following example creates a primary key on the column TransactionID in the AdventureWorks database. Using Transact-SQL Create a primary key in an existing table

For more information, see Modify Primary Keys. However, you can change the order of columns after the primary key is created. If you define a compound key, the order of columns in the primary key matches the order of columns as shown in the table. If a primary key consists of more than one column, duplicate values are allowed in one column, but each combination of values from all the columns in the primary key must be unique. A message will warn you that existing relationships will be automatically deleted as part of this process.Ī primary key column is identified by a primary key symbol in its row selector. If you want to redefine the primary key, any relationships to the existing primary key must be deleted before the new primary key can be created. Right-click the row selector for the column and select Set Primary Key.If you want to select multiple columns, hold down the CTRL key while you click the row selectors for the other columns. In Table Designer, click the row selector for the database column you want to define as the primary key.In Object Explorer, right-click the table to which you want to add a unique constraint, and click Design.Using SQL Server Management Studio Create a primary key

If nullability is not specified, all columns participating in a PRIMARY KEY constraint have their nullability set to NOT NULL.Ĭreating a new table with a primary key requires CREATE TABLE permission in the database and ALTER permission on the schema in which the table is being created.Ĭreating a primary key in an existing table requires ALTER permission on the table. Before You Begin Limitations and RestrictionsĪ table can contain only one PRIMARY KEY constraint.Īll columns defined within a PRIMARY KEY constraint must be defined as NOT NULL. Creating a primary key automatically creates a corresponding unique clustered index, or a nonclustered index if specified as such. You can define a primary key in SQL Server by using SQL Server Management Studio or Transact-SQL.

Sqlpro for mssql key