How do I SELECT a table variable in SQL?

How do I SELECT a table variable in SQL?

Insert for a Table Variable from a SQL Server Select Statement

1. The first step appears in the first code block with a header comment of “declare table variable”.
2. 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 SELECT a variable in a query?

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 assign a SELECT query to a variable in SQL?

To assign a value to a variable, use the SET statement. This is the preferred method of assigning a value to a variable. A variable can also have a value assigned by being referenced in the select list of a SELECT statement.

How do you use a SELECT query as a table?

Summary

1. Use the SELECT statement to query data from a table.
2. Specify one or more column names after the SELECT clause to which you want to query data.
3. Specify the name of the table from which you want to query data.

How can I use SQL query as a table?

SQL CREATE TABLE Statement

1. CREATE TABLE table_name ( column1 datatype, column2 datatype, column3 datatype,
2. Example. CREATE TABLE Persons ( PersonID int,
3. CREATE TABLE new_table_name AS. SELECT column1, column2,… FROM existing_table_name.
4. Example. CREATE TABLE TestTable AS. SELECT customername, contactname.

Can you select from a table variable in SQL?

You cannot do what your trying to do this way. But you can Declare a Table Variable and then populate that table variable and select from that table variable. something like this…

How to set table name as a variable in SQL?

The first block will declare the variable, and set the table name based on the current year and month name, in this case TEST_2012OCTOBER. I then check if it exists in the database already, and remove if it does. Then the next block will use a SELECT INTO statement to create the table and populate it with records from another table with parameters.

How to use SELECT statement in SQL Server?

SQL Server Functions. The SQL SELECT Statement. The SELECT statement is used to select data from a database. The data returned is stored in a result table, called the result-set. The following SQL statement selects all the columns from the “Customers” table: Example.

When to use a variable in select statement?

The first SELECT works fine, but the second generates an error suggesting I am trying to create a table variable. All I want though is to use a variable for the name of an existing table.