I'm trying to set a variable from a SQL query: declare @ModelID uniqueidentifer Select @ModelID = select modelid from models where areaid = 'South Coast' Obviously I'm not doing this right …

Be careful when you simply append values of variables to your statements: Imagine a user naming himself ';DROP TABLE Users;' -- That's why you need to use SQL escaping, which …

Oct 13, 2023 · The DBA asked me to replace the const and variable values with the bind parameters in a complex SQL statement to improve the performance of the query. However, I …

In another question I posted someone told me that there is a difference between: @variable and: variable in MySQL. He also mentioned how MSSQL has batch scope and MySQL has session …

Apr 18, 2012 · Is it possible to set/read variables from within the query? pseudo code: SELECT animal_name, @tallest_animal = (select top 1 height from animal order by height desc) as …

May 18, 2023 · DECLARE indicates a block of code used to define variables at the start of your SP, before you want to use them. LET is used define a single variable at the point where you …

Aug 8, 2012 · For SQL Server 2012 and below the only indexes that could be created on table variables were those implicitly created through a UNIQUE or PRIMARY KEY constraint. SQL …

Aug 26, 2008 · If you're writing a function you should use table variables over temp tables unless there's a compelling need otherwise. Both table variables and temp tables are stored in …

@MyVariable and @myvariable are the same variables in SQL Server Man. Studio and will work. However, these variables will result in a "Must declare the scalar variable "@MyVariable" in …

PROBLEM I am struggling to define variables in PL/SQL in T-SQL it is easy to declare & set variables and reference them in Select query (as below). But how would I do something similar …