Escaping T-SQL Keywords

487    Asked by CameronOliver in SQL Server , Asked on Sep 11, 2021

$sql = "SELECT Kill FROM tbl_pvporderview"; Problem is that I end up with: Incorrect syntax near the keyword 'Kill'. Because kill is a T-SQL command... any way to bypass it? I can't change the column name because it's used by the software a lot and I cant change the software that's using the database. So it simply fails if I use sqlserv to select data from that column. '' or "" wont help. The complete statement would be: $sql = "SELECT serial,Kill FROM tbl_pvporderview WHERE Kill > (?) ORDER BY Kill DESC "; What are sql server reserved words?

Answered by Carl Paige

SQL server reserved words  Reserved words are SQL keywords and other symbols that have special meanings when they are processed by the Relational Engine. Reserved words are not recommended for use as database, table, column, variable or other object names.

If you want to use reserved words as table or column names, you have 2 options:
use brackets (the SQL-Server's way): SELECT [Kill]
or double-quotes* (the ANSI/ISO standard): SELECT "Kill"
Your whole statement would become:
SELECT [serial], [Kill] FROM tbl_pvporderview WHERE [Kill] > (?) ORDER BY [Kill] DESC ;
*: Of course, using double quotes (SELECT "Kill") would necessitate that QUOTED_IDENTIFIER is ON. You may encounter databases that the setting is still SET OFF.

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