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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...
How to replace a string in a SQL Server Table Column
I have a table ( SQL Sever ) which references paths ( UNC or otherwise), but now the path is going to change.
10 Answers
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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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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...
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...
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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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...
“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...
How can you represent inheritance in a database?
I'm thinking about how to represent a complex structure in a SQL Server database.
8 Answers
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