calculated-columns

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MySQL query calculated column

I have these queries: SELECT a.Id, a.Name, (SELECT COUNT(Id) FROM b WHERE b.IdTableA = a.Id) AS Num FROM a[详细]

2023-04-11 10:55 分类：问答
How can I convert the division of two integer values to a decimal using T-SQL against a iSeries AS/400 Database?

Assuming the follo开发者_如何学Cwing query: SELECT ID, COUNT(1) AS NumRecords, SUM(Quantity) AS TotalQty[详细]

2023-04-11 07:15 分类：问答
mySQL Query design - calculating a vote score for multiple content items

I have a content items table structured like contentid |message|categoryid|userid|dateadded | etc.. 15foo bar34somedate[详细]

2023-04-11 00:30 分类：问答
How to detect if a column is a computed column

I\'m working with SQL Server 2000 and Java. I am creating an application that, among other things, reads the metadata from the tables, recreates them at another server and carry the data.[详细]

2023-04-09 16:08 分类：问答
postgresql calculate sum of a resultset

Is there any built in function in postgresql to get the sum of of开发者_Go百科 a column. Just a simple example[详细]

2023-04-03 20:35 分类：问答
function equalHeight , set a minimum Height to apply?

I have tried everything, but without javascript I cannot achieve the bad layout my designer gave to me!![详细]

2023-04-01 07:32 分类：问答
Output Multiple Aggregates From One Table

I have a single table \'EMPLOYEE\'. I need to count the \'emp_no\', so that I have a multiple columns with each aggregate based on different restrictions. Not sure how to write to get the below output[详细]

2023-03-27 06:49 分类：问答
SQL calculations as read only fields in Doctrine 1.2

Consider the following data schema: Employee: columns: name: string(255) activeSince: date activeUntil: date[详细]

2023-03-25 03:23 分类：问答
EF4 Computed columns in SQL Server not visible

I have an SQ开发者_C百科L server table with one computed column based on 2 other columns on the same table. I have a WCF application in C# that uses EF4 to access the said table.In EF4 the entity corr[详细]

2023-03-24 17:07 分类：问答
Use master.sys.fn_varbintohexsubstring in computed column

In my sql server table, I want to add a computed column that is a hash of other columns in the same table. Below is my table structure.[详细]

2023-03-24 04:07 分类：问答