StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
1776502
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2009-11-21T19:37:22.610
FavoriteCount
0
LastActivityDate
2009-11-21T19:42:59.307
LastEditDate
2017-05-23T10:32:52.620
LastEditorUserId
-1
OwnerUserId
110933
ParentId
1776488
PostTypeId
2
Score
3
ViewCount
0
LastEditorDisplayName
text
Body
Well, there won't be an absolute list of dos and donts as the goal posts keep moving. MySql moved on in leaps and bounds between versions 4 and 5, and some fairly essential bug fixes for MySql seem to be around the corner (I'm thinking of the issue surrounding the use of <code>count(distinct col1) from ...</code>). Here are a couple of issues off the top of my head: <ol> <li>don't rely on views to be able to use indexes on the underlying tables</li> </ol> <a href="http://forums.mysql.com/read.php?100,22967,66618#msg-66618" rel="nofollow noreferrer">http://forums.mysql.com/read.php?100,22967,66618#msg-66618</a> <ol start="2"> <li>The order of columns in indexes intended to be used by <code>GROUP BY</code> is important:</li> </ol> <a href="http://dev.mysql.com/doc/refman/5.1/en/group-by-optimization.html" rel="nofollow noreferrer">http://dev.mysql.com/doc/refman/5.1/en/group-by-optimization.html</a> <ol start="3"> <li><code>COUNT(DISTINCT)</code> is slow:</li> </ol> <a href="http://www.delphifaq.com/faq/databases/mysql/f3095.shtml" rel="nofollow noreferrer">http://www.delphifaq.com/faq/databases/mysql/f3095.shtml</a> <ol start="4"> <li>although there might be a bug fix a-coming....</li> </ol> <a href="http://bugs.mysql.com/bug.php?id=17865" rel="nofollow noreferrer">http://bugs.mysql.com/bug.php?id=17865</a> Here are some other questions from this site you might find useful: <a href="https://stackoverflow.com/questions/579244/mysql-database-optimization-best-practices">Database opimization</a> <a href="https://stackoverflow.com/questions/1123011/quick-tips-on-relational-database-design-for-mysql">Database design with MySql</a> <a href="https://stackoverflow.com/questions/1092533/looking-for-mysql-optimization-and-fine-tuning-tips">Finetuning tips</a>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POMySQL - Do's and Don'ts
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USCommunity
UserOwnerUserId
1. USdavek
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.