SYSCOLUMNS

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Purpose

Description of the table columns available in the catalog


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
TABLE_CAT C 30 Table catalog
TABLE_SCHEM C 30 Table schema
TABLE_NAME C 30 Table name
COLUMN_NAME C 25 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 L 1 Reserved
DECIMAL_DIGITS N 2 Scale
NUM_PREC_RADIX N 2 Radix (typically either 10 or 2)
NULLABLE N 2 Is NULL allowed?
REMARKS C 25 Comment describing column
COLUMN_DEF C 30 Default value
SQL_DATA_TYPE N 1 Reserved
SQL_DATETIME_SUB N 1 Reserved
CHAR_OCTET_LENGTH N 1 For char types the maximum number of bytes in the column
ORDINAL_POSITION N 4 Index of column in table (starting at 1)
IS_NULLABLE C 3 "NO" means column definitely does not allow NULL values; "YES" means the column might allow NULL values. An empty string means unknown.


Example

SELECT * FROM syscolumns;
WHERE type_name = 'DATETIME'


Products

Recital, Recital Server