Using queries to find data

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T-SQL

Why we use the symbol '%" when we query a database?

Posted 18-May-13 0:59am

FjollaValo

Updated 18-May-13 1:12am

Zoltán Zörgő

v2

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**Zoltán Zörgő** · Accepted Answer · 2013-05-18T01:14:00

All rdbms sql implementations provide wildcard. At least two of them: one for substituting any character and one for substituting any character sequence - so actually for simple pattern matching. % is for character sequences in t-sql. Look here for a more detailed explanation: http://www.w3schools.com/sql/sql_wildcards.asp[^].

OriginalGriff · Accepted Answer · 2013-05-18T01:15:00

Solution 2

It's the SQL equivalent of Windows '*' in file names - it means "match anything"
So in SQL

SQL

SELECT * FROM MyTable WHERE userName LIKE '%fred%'

will match

fred
freda
fred smith
john fredericks

But not

fre del
red adaire

[edit]Wow! Loads of typos... - OriginalGriff[/edit]

Posted 18-May-13 1:15am

OriginalGriff

Updated 18-May-13 1:16am

v2

Comments

FjollaValo 18-May-13 21:48pm

thanks guys..

OriginalGriff 19-May-13 3:46am

You're welcome!