April 2006
Intermediate to advanced
1088 pages
24h 51m
English
Content preview from A Developer’s Guide to SQL Server 2005Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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5. User-Defined Types and Aggregates
SQL SERVER PROVIDES types for scalars like FLOAT and CHAR. These can be represented by a single value, such as a number or a string. Some scalars, such as a date, require more than one value to be represented. A date has a month, day, and year value in its representation. SQL Server provides the DATETIME scalar type for dates. There are other scalars that require more than one value to represent them for which SQL Server does not provide a scalar type. Dimensions in a mechanical drawing, for example, have quantity value and unit value, like “12 in.” SQL Server 2005 allows a Common Language Runtime, CLR, language to be used to add scalar types and aggregates to SQL Server that can be used in the same way that ...
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