Difference between revisions of "SYSBESTROWIDENTIFIER"
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==Purpose== | ==Purpose== | ||
Description of a table’s optimal set of columns that uniquely identifies a row | Description of a table’s optimal set of columns that uniquely identifies a row | ||
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==See Also== | ==See Also== | ||
[[SQL Data Types|DATA TYPES]], [[SQL SELECT|SELECT]], [[SQL System Tables|SYSTEM TABLES]] | [[SQL Data Types|DATA TYPES]], [[SQL SELECT|SELECT]], [[SQL System Tables|SYSTEM TABLES]] | ||
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==Description== | ==Description== | ||
System Tables are system defined read-only tables. You can query these tables using the SELECT statement. | System Tables are system defined read-only tables. You can query these tables using the SELECT statement. | ||
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!Column||Data Type||Width||Description | !Column||Data Type||Width||Description | ||
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|DATA_TYPE||N||2||SQL data type | |DATA_TYPE||N||2||SQL data type | ||
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| − | |TYPE_NAME||C||30||Data source dependent type name | + | |valign="top"|TYPE_NAME||valign="top"|C||valign="top"|30||Data source dependent type name |
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|COLUMN_SIZE||N||3||Precision | |COLUMN_SIZE||N||3||Precision | ||
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|} | |} | ||
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==Example== | ==Example== | ||
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</code> | </code> | ||
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[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:SQL]] | [[Category:SQL]] | ||
[[Category:System Tables]] | [[Category:System Tables]] | ||
Latest revision as of 10:37, 31 January 2013
Contents
Purpose
Description of a table’s optimal set of columns that uniquely identifies a row
See Also
DATA TYPES, SELECT, SYSTEM TABLES
Description
System Tables are system defined read-only tables. You can query these tables using the SELECT statement.
| Column | Data Type | Width | Description |
|---|---|---|---|
| SCOPE | N | 1 | Actual scope of result |
| COLUMN_NAME | C | 30 | Column name |
| DATA_TYPE | N | 2 | SQL data type |
| TYPE_NAME | C | 30 | Data source dependent type name |
| COLUMN_SIZE | N | 3 | Precision |
| BUFFER_LENGTH | N | 1 | Reserved |
| DECIMAL_DIGITS | N | 2 | Scale |
| PSEUDO_COLUMN | N | 1 | Is this a pseudo column? |
Example
SELECT column_name FROM sysbestrowidentifier
