I\'ve got two tables with a many to one relationship which I\'ll call Parent_Table and Child_Table (i.e. a parent has zero or more children, but children have exactly one parent).I need to count the n
If I\'m creating a database which would be used by lot of differe开发者_如何转开发nt users at the same time constantly inserting and retrieving rows, would multiple tables be better? If not speed-wise
I am trying to build a table that summarizes how many times pages in our Wiki references certain macros.
I am using Oracle 10g. Here is my query select * from Entries where RefKey in (select RefKey from Entries
I have a hard time with query optimization, currently I\'m very close to the point of database redesign. And the stackoverflow is my last hope. I don\'t think that just showing you the query is enough
My current version is : SELECTDT, AVG(DP_H2O) AS Tx, (SELECTAVG(Abs_P) / 1000000 AS expr1 FROMdbo.BACS_MinuteFlow_1
It\'s hard to compose a topic name for me. But I can开发者_开发知识库 show an example : WHERE(SELECT [ID_Line] FROM [Event] WHERE [Event].[Name]= [A].[Col]) = 2
Hi guys I have the following three tables here. COUNTRIES ID | Name | Details Airports ID | NAME | CountryID
Heres the deal - I have three tables here: Companies: ID | NAME | DETAILS TAGS ID | TAGNAME TAGS_COMPANIES
I need to rotate my table , so I need to make a columns if some field (ID) got some value I made a custom query :
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