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In SQL, what's the difference between count(column) and count(*)?
... answered Sep 12 '08 at 15:28
SQLMenaceSQLMenace
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When to use RDLC over RDL reports?
...mplement SSRS Server. They are a built in extension of Visual Studio from SQL Server for the reporting language. When you install SSRS you should have an add on called 'Business Intelligence Development Studio' which is much easier to work with the reports than without it.
R eport
D efinition
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Why would you use Expression rather than Func?
...trees and look inside them instead of executing them. For example, LINQ to SQL gets the expression and converts it to the equivalent SQL statement and submits it to server (rather than executing the lambda).
Conceptually, Expression<Func<T>> is completely different from Func<T>. F...
SQL Server: Filter output of sp_who2
Under SQL Server, is there an easy way to filter the output of sp_who2? Say I wanted to just show rows for a certain database, for example.
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How to solve privileges issues when restore PostgreSQL Database
...mments this should not be used in production:
root@server:/var/log/postgresql# sudo -u postgres psql
psql (8.4.4)
Type "help" for help.
postgres=# \du
List of roles
Role name | Attributes | Member of
-----------------+-------------+-----------
<user-name> | Superus...
Preserving order with LINQ
... @Amy B yes but it doesn't apply to Linq to Objects. In Linq to Sql, distinct() puts the distinct keyword into the generated sql, and ordering from sql is not guaranteed. I'd be interested to see an implementation of distinct for linq to objects that doesn't preserve order and is more ef...
贝因美创始人谈连续创业 谢宏：蓝海策略下的未来赢家 - 资讯 - 清泛网 - 专...
...业创新的关键点是什么？
谢宏：首先是三要素比配，这包括项目、资金、团队契合，导致成功要素是资源足够充分，机会趋势把握良好；其二就要求体制、机制、人事高效，投入产出比高；其三，就是能很好解决——“蛋糕怎...
“A lambda expression with a statement body cannot be converted to an expression tree”
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Is objects a Linq-To-SQL database context? In which case, you can only use simple expressions to the right of the => operator. The reason is, these expressions are not executed, but are converted to SQL to be executed against the database.
Try...
T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition
...ues.
The only way to do specifically what you're asking is to use dynamic SQL. This is, however, something I'd encourage you to stay away from. The solution above will almost certainly be sufficient for what you're after.
s...
MySQL 'create schema' and 'create database' - Is there any difference
...etween the create schema command and the create database command for MySQL.
6 Answers
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