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Data Conversion in SQL Server

Most of the time, you do not have to worry about implicit conversion in SQL expressions, or when assigning a value to a column. Just occasionally, though, you'll find that data gets truncated, queries run slowly, or comparisons just seem plain wrong. Robert Sheldon explains why you sometimes need to be very careful if you mix data types when manipulating values.

2011-01-12

4,537 reads

External Article

Contiguous Time Periods

It is always more efficient to maintain referential integrity by using constraints rather than triggers. Sometimes it isn't obvious how to do this. Until a recent idea by Alex Kuznetsov, the history table presented problems for checking data that were difficult to solve with constraints. Joe Celko explains.

2011-01-11

3,294 reads

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Question of the Day

The Last Binary Value of the Year

What does this code return?

SELECT cast(0x2025 AS NVARCHAR(20))
Image 1: Image 2: Image 3: Image 4:

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