how to make this select statement more faster? the first left join with the subselect is making it slower...
As I build bigger, more advanced web applications, I\'m finding myself writing extremely long and complex queries. I tend to write queries within queries a lot because I feel making one call to the da
Why doesn\'t the following work? SELECT name FROM (SELECT name FROM agentinformation) 开发者_开发技巧
Given a table foo with a composite primary key (a,b), is there a legal syntax for writing a query such as:
I looked at the \"Related Questions\" as I started this, but none of them are exactly the same as what I\'m trying do.
I get the following error while running this query: #1241 - Operand should contain 1 column(s) SELECT *,
I have a many-to-many relations table and I need to DELETE the unneeded rows. The lastviews table\'s structure is:
This code doesn\'t work for MySQL 5.0, how to re-write it to make it work DELETE FROM posts where id=(SELECT id FROM posts GROUP BY idHAVING ( COUNT(id) > 1 ))
I need to join a table to the a select/group-by query (which includes the same table), and I\'d like to do it using Arel.
The select query has to display seperate row for every value it gets but on executing this query it yields only first value from the sub query used in IN cla开发者_运维百科use.
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