How will you code the variables in the table?

If we want to declare a table variable, we have to start the DECLARE statement which is similar to local variables. The name of the local variable must start with at(@) sign. The TABLE keyword specifies that this variable is a table variable.

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Can we use table variable in CTE?

You cannot create an index on CTE. Table Variable acts like a variable and exists for a particular batch of query execution. It gets dropped once it comes out of a batch. This is also created in the tempdb database but not the memory.

Can I use table variable in dynamic SQL?

Table variables are only visible in the scope where they are defined. They’re like normal variables. Since you declared the table variable outside the dynamic SQL, it’s not visible inside the dynamic SQL.

Does MySQL support table variable?

TO answer your question: no, MySQL does not support Table-typed variables in the same manner that SQL Server (http://msdn.microsoft.com/en-us/library/ms188927.aspx) provides.

How do I add a variable to a table in SQL?

Insert for a Table Variable from a SQL Server Select Statement

The first step appears in the first code block with a header comment of “declare table variable”.
The second step in the code block is an INSERT statement that populates a table variable from the result set of a SELECT statement.

How do you write a variable in SQL query?

The syntax for assigning a value to a SQL variable within a SELECT query is @ var_name := value , where var_name is the variable name and value is a value that you’re retrieving. The variable may be used in subsequent queries wherever an expression is allowed, such as in a WHERE clause or in an INSERT statement.

Which is better CTE or table variable?

This biggest difference is that a CTE can only be used in the current query scope whereas a temporary table or table variable can exist for the entire duration of the session allowing you to perform many different DML operations against them.

Which is better CTE or subquery?

CTE can be more readable: Another advantage of CTE is CTE are more readable than Subqueries. Since CTE can be reusable, you can write less code using CTE than using subquery. Also, people tend to follow the logic and ideas easier in sequence than in a nested fashion.

What is Dynamic SQL example?

For example, dynamic SQL lets you create a procedure that operates on a table whose name is not known until runtime. In past releases of Oracle, the only way to implement dynamic SQL in a PL/SQL application was by using the DBMS_SQL package.

How do I declare a variable in MySQL?

To declare a variable inside a stored procedure, you use the DECLARE statement as follows:

DECLARE variable_name datatype(size) [DEFAULT default_value];
DECLARE totalSale DEC(10,2) DEFAULT 0.0;
DECLARE x, y INT DEFAULT 0;
SET variable_name = value;
DECLARE total INT DEFAULT 0; SET total = 10;