#temp-tables

Fixed What's the difference between a temp table and table variable in SQL Server? #dev #it #asnwer

What’s the difference between a temp table and table variable in SQL Server?

In SQL Server 2005, we can create temp tables one of two ways:

declare @tmp table (Col1 int, Col2 int);

or

create table #tmp (Col1 int, Col2 int);

What are the differences between the two? I have read conflicting opinions on whether @tmp still uses tempdb, or if everything happens in memory.

In which scenarios does…

Fixed Create a temporary table in a SELECT statement without a separate CREATE TABLE #dev #it #asnwer

Create a temporary table in a SELECT statement without a separate CREATE TABLE

Is it possible to create a temporary (session only) table from a select statement without using a create table statement and specifying each column type? I know derived tables are capable of this, but those are super-temporary (statement-only) and I want to re-use.

It would save time if I did not have to write up a…

Fixed check if temp table exist and delete if it exists before creating a temp table #dev #it #asnwer

check if temp table exist and delete if it exists before creating a temp table

I am using the following code to check if the temp table exists and drop the table if it exists before creating again. It works fine as long as I don’t change the columns. If I add a column later, it will give an error saying “invalid column”. Please let me know what I am doing wrong.

IF OBJECT_ID('tempdb..#Results')…

How to: What's the difference between a temp table and table variable in SQL Server?

What’s the difference between a temp table and table variable in SQL Server?

In SQL Server 2005, we can create temp tables one of two ways:

declare @tmp table (Col1 int, Col2 int);

or

create table #tmp (Col1 int, Col2 int);

What are the differences between the two? I have read conflicting opinions on whether @tmp still uses tempdb, or if everything happens in memory.

In which scenarios does…

How to: Create a temporary table in a SELECT statement without a separate CREATE TABLE

Create a temporary table in a SELECT statement without a separate CREATE TABLE

Is it possible to create a temporary (session only) table from a select statement without using a create table statement and specifying each column type? I know derived tables are capable of this, but those are super-temporary (statement-only) and I want to re-use.

It would save time if I did not have to write up a…

How to: check if temp table exist and delete if it exists before creating a temp table

check if temp table exist and delete if it exists before creating a temp table

I am using the following code to check if the temp table exists and drop the table if it exists before creating again. It works fine as long as I don’t change the columns. If I add a column later, it will give an error saying “invalid column”. Please let me know what I am doing wrong.

IF OBJECT_ID('tempdb..#Results')…