How does a condition works in sqlite with "and", "or" and "LIKE"?

Question

0.00/5 (No votes)

See more:

I have an issue here. I have an SQLite command here where my "WHERE" doesn't work as intended. I am new to SQLite in general and it's the first time I work a lot with "AND", "OR" and "LIKE".

I am trying to understand why Num1 and the other integer value are not working.

"SELECT * FROM tbl_Device 
WHERE  Num1 = '1' AND Num2 = '2' AND Num3 = '3' 
AND Flag LIKE 'LastVersion' OR  Flag LIKE 'OnlyVersion'"

So here I am suppose to only get a Num1 of 1, Num2 of 2 and Num3 of 3, but I also get something that I didn'ty wanted: Num1 of 5, Num2 of 3 and Num3 of 4

I don't know where I am wrong here, so I thought I could use some help.

What I have tried:

"SELECT * FROM tbl_Device 
WHERE  Num1 = '1' AND Num2 = '2' AND Num3 = '3' 
AND Flag LIKE 'LastVersion' OR  Flag LIKE 'OnlyVersion'"

Posted 2-Mar-21 7:13am

Etienne-Perinet

Updated 2-Mar-21 7:30am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CHill60 · Accepted Answer · 2021-03-02T07:30:00

When mixing 'and' and 'or' you must use brackets to show what you really mean e.g.

SQL

SELECT * FROM tbl_Device 
WHERE  
(Num1 = '1' AND Num2 = '2' AND Num3 = '3' )
AND 
( Flag LIKE 'LastVersion' OR  Flag LIKE 'OnlyVersion' )

As an aside there is no point in using 'LIKE' unless you are using a wildcard e.g.

SQL

LIKE 'LastVersion%'

You probably wanted to use

SQL

AND Flag IN ('LastVersion','OnlyVersion')

in which case you wouldn't have hit the and/or problem