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What's the difference between IQueryable and IEnumerable
...t of as "is the 'Age' property > 18".
This allows things like LINQ-to-SQL to exist because they can parse the expression tree and convert it into equivalent SQL. And because the provider doesn't need to execute until the IQueryable is enumerated (it implements IEnumerable<T>, after all)...
Nested select statement in SQL Server
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SQL how to increase or decrease one for a int column in one command
...al ways to do this. Since you did not specify a database, I will assume MySQL.
INSERT INTO table SET x=1, y=2 ON DUPLICATE KEY UPDATE x=x+1, y=y+2
REPLACE INTO table SET x=1, y=2
They both can handle your question. However, the first syntax allows for more flexibility to update the record rath...
How to assign an exec result to a sql variable?
How do you assign the result of an exec call to a variable in SQL? I have a stored proc called up_GetBusinessDay , which returns a single date.
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optional parameters in SQL Server stored proc?
I'm writing some stored procs in SQL Server 2008, and wondered if the concept of optional input parameters is possible here?
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How do SQL EXISTS statements work?
I'm trying to learn SQL and am having a hard time understanding EXISTS statements. I came across this quote about "exists" and don't understand something:
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Unique Constraint in Entity Framework Code First
...alizable isolation level because of performance reasons. The default in MS Sql Server is read committed. See the 4 part series starting at: michaeljswart.com/2010/03/…
– Nathan
Jan 15 '14 at 16:32
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Difference between left join and right join in SQL Server [duplicate]
I know about joins in SQL Server.
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Difference Between Schema / Database in MySQL
Is there a difference between a schema and a database in MySQL? In SQL Server, a database is a higher level container in relation to a schema.
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What's the difference between a temp table and table variable in SQL Server?
In SQL Server 2005, we can create temp tables one of two ways:
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