How do you DECLARE a variable in SQL?

How do you DECLARE a variable in SQL?

Variables in SQL procedures are defined by using the DECLARE statement. Values can be assigned to variables using the SET statement or the SELECT INTO statement or as a default value when the variable is declared. Literals, expressions, the result of a query, and special register values can be assigned to variables.

How do you DECLARE a temp variable in SQL?

We can declare Temp Variables only using a Declare statement but Temp Tables can be created using Create Table and Select Into commands. We cannot drop a Temp variable but Temp Tables can be dropped using a Drop Command. We cannot use the truncate command for Temp Variables but we can do it for Temp Tables.

How do you DECLARE a date variable in SQL?

To declare a date variable, use the DECLARE keyword, then type the @variable_name and variable type: date, datetime, datetime2, time, smalldatetime, datetimeoffset. In the declarative part, you can set a default value for a variable. The most commonly used default value for a date variable is the function Getdate().

What is DECLARE cursor?

DECLARE CURSOR defines the attributes of a Transact-SQL server cursor, such as its scrolling behavior and the query used to build the result set on which the cursor operates. The OPEN statement populates the result set, and FETCH returns a row from the result set.

What is identity SQL?

Identity column of a table is a column whose value increases automatically. The value in an identity column is created by the server. A user generally cannot insert a value into an identity column. Identity column can be used to uniquely identify the rows in the table.

Why declare is used in SQL?

How do you declare data types?

If you want to declare two integer type variables with the names myInteger and MyInteger in Java it will be written as: int myInteger; int MyInteger; This declaration comprises of 3 parts – first the data type int is declared, then the variable name myInteger and finally the statement is concluded with a semicolon ; .

When to use declare command in SQL Server?

DECLARE command is used to DECLARE variable which acts as a placeholder for the memory location. Only once the declaration is made, a variable can be used in the subsequent part of batch or procedure. Initialization is an optional thing while declaring.

When to declare a variable in SQL Server?

Before using any variable in batch or procedure, you need to declare the variable. DECLARE command is used to DECLARE variable which acts as a placeholder for the memory location. Only once the declaration is made, a variable can be used in the subsequent part of batch or procedure.

Which is the free version of SQL Server 2012?

Microsoft SQL Server 2012 Express with SP2 are a free, feature-rich editions of SQL Server that is ideal for learning, developing, powering desktop, web & small server applications, and for redistribution by ISVs. The SQL Server 2012 SP2 Express release includes the full version of SQL Server 2012 Management Studio with SP2 instead

What’s the difference between SQL Server 2012 SP2 and x86?

SQLEXPR_x86 is the same product but supports installation onto both 32-bit and 64-bit (WoW) operating systems. SQLEXPR_x64 is a native 64-bit SQL Server 2012 Express SP2 and supports installation onto only 64-bit operating systems. There is no other difference between these packages.