December 2006
Beginner
912 pages
24h 44m
English
Content preview from Professional SQL Server™ 2005 Programming
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A.6. Metadata Functions
The metadata functions provide information about the database and database objects. They are:
COL_LENGTH
COL_NAME
COLUMNPROPERTY
DATABASEPROPERTY
DATABASEPROPERTYEX
DB_ID
DB_NAME
FILE_ID
FILE_NAME
FILEGROUP_ID
FILEGROUP_NAME
FILEGROUPPROPERTY
FILEPROPERTY
FULLTEXTCATALOGPROPERTY
FULLTEXTSERVICEPROPERTY
INDEX_COL
INDEXKEY_PROPERTY
INDEXPROPERTY
OBJECT_ID
OBJECT_NAME
OBJECTPROPERTY
OBJECTPROPERTYEX
SCHEMA_ID
SCHEMA_NAME
SQL_VARIANT_PROPERTY
TYPE_ID
TYPE_NAME
TYPEPROPERTY
A.6.1. COL_LENGTH
The COL_LENGTH function returns the defined length of a column. The syntax is as follows:
COL_LENGTH('<table>', '<column>')
The column parameter specifies the name of the column for which the length is to be determined. The table parameter specifies the name of the table that contains that column.
A.6.2. COL_NAME
The COL_NAME function takes a table ID number and a column ID number and returns the name of the database column. The syntax is as follows:
COL_NAME(<table_id>, <column_id>)
The column_id parameter specifies the ID number of the column. The table_id parameter specifies the ID number of the table that contains that column.
A.6.3. COLUMNPROPERTY
The COLUMNPROPERTY function returns data about a column or procedure parameter. The syntax is as follows:
COLUMNPROPERTY(<id>, <column>, <property>)
The id parameter specifies the ID of the table/procedure. The column parameter specifies the name of the column/parameter. The property parameter specifies the data that should be returned for the column ...
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