How do I cast a column datatype in SQL?

How do I cast a column datatype in SQL?

SQL CAST Function

1. CAST (expression AS [data type])
2. SELECT First_Name, CAST(Score AS Integer) Int_Score FROM Student_Score;
3. SELECT First_Name, CAST(Score AS char(3)) Char_Score FROM Student_Score;

How do I cast a column?

The casting procedure is as follows.

1. Collect samples for maturity testing.
2. The surfaces of construction joints should the thoroughly wet, free from laitance before pouring fresh concrete.
3. For the casting, deposit concrete continuously.

Can you make a computed column as persisted?

To be able to make a computed column as Persisted it has to be deterministic. Here are a few rules: If Persisted property is off then calculated column will be just a virtual column. No data for this column will be stored on disk and values will be calculated every time when referenced in a script.

When to use persisted property in SQL Server?

You may have noticed that we also used the property “Persisted” for our computed column. This property for computed columns has been introduced in SQL Server 2005 and onwards. It is important for any computed column, because many additional features depend on it. To be able to make a computed column as Persisted it has to be deterministic.

How to decide the data type of this column?

CREATE TABLE OrderDetail ( OrderID INT , ProductID INT , Qty INT , OrderDate DATETIME , ShipDate DATETIME , STATUS AS CASE WHEN shipdate is NULL AND orderdate < DATEADD ( dd, -7, GETDATE ()) THEN 3 WHEN shipdate is NOT NULL THEN 2 ELSE 1 end ) GO How SQL Server decides the data type of this column?

Is there a way to force a data type?

In addition, if you want to force a specific data type instead of relying on data type precedence, you can use CONVERT or CAST in the computation to force it (assuming all potential outcomes are compatible with the type you choose).