473,395 Members | 2,079 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,395 software developers and data experts.

No parens in where clause

Ike
I cannot find now, what the precedence is in the where clause of a select
statement, where "AND" and "OR" are mixed in, and there are no parentheses.

For example:

WHERE a=1 and b=2 or c=3

How would that be "parenthesized" internally in MySQL? What is the rule for
precedence between and and or? Thanks IKe
May 12 '06 #1
1 1347
Ike wrote:
WHERE a=1 and b=2 or c=3

What is the rule for precedence between and and or?


AND has higher precedence than OR.

E.g.:

WHERE (a=1 AND b=2) OR c=3

FWIW, this is the same boolean operator precedence as in virtually any
other programming language you care to mention.

See also http://dev.mysql.com/doc/refman/5.0/...recedence.html

Regards,
Bill K.
May 12 '06 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

12
by: Stephen Ferg | last post by:
I've just spent several very frustrating hours tracking down a bug in one of my programs. The problem was that I was writing text to a file, and when I was done I coded f.close when I should...
3
by: A.V.C. | last post by:
Hello, I found members of this group very helpful for my last queries. Have one problem with CASE. I can use the column name alias in Order By Clause but unable to use it in WHERE CLAUSE. PLS...
2
by: Terry Olsen | last post by:
I have an SQL database with rows that have parens in the data. If I run a select statement such as: SELECT SongName FROM Songs WHERE SongName = 'John Jacob (Jingleheimer Schmidt)' It...
2
by: Jim.Mueksch | last post by:
I am having a problem with using calculated values in a WHERE clause. My query is below. DB2 gives me this error message: Error: SQL0206N "APPRAISAL_LESS_PRICE" is not valid in the context where...
9
by: Emin | last post by:
Dear Experts, I have a fairly simple query in which adding a where clause slows things down by at least a factor of 100. The following is the slow version of the query ...
8
by: chrisdavis | last post by:
I'm trying to filter by query or put those values in a distinct query in a where clause in some sort of list that it goes through but NOT at the same time. Example: ROW1 ROW2 ROW3 ROW4 ,...
5
by: pwiegers | last post by:
Hi, I'm trying to use the result of a conditional statement in a where clause, but i'm getting 1)nowhere 2) desperate :-) The query is simple: -------- SELECT idUser,...
4
by: Jane T | last post by:
I appreciate how difficult it is to resolve a problem without all the information but maybe someone has come across a similar problem. I have an 'extract' table which has 1853 rows when I ask for...
12
by: =?ISO-8859-1?Q?Ren=E9?= | last post by:
Hi, is there a rule of thumb what is better/faster/more performant in SQL Server 2005? a) SELECT * FROM A INNER JOIN B ON B.ID = A.ID AND B.Cond1 = 1 AND B.Cond2 = 2 b) SELECT * FROM A INNER...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.