Key_Column_Usage View

For every constraint (except NOT_NULL) and every index, the used columns and their ordinal positions within this order are listed.

This view is part of the ANSI SQL-2 standard Information Schema.

 

Column

Data Type

N

Description

RECORD_NUMBER

integer

n

unique identifier for this record of metadata

CONSTRAINT_CATALOG

identifier

n

constraint catalog

CONSTRAINT_SCHEMA

identifier

n

constraint schema

CONSTRAINT_NAME

identifier

n

constraint name

TABLE_CATALOG

identifier

n

table catalog

TABLE_SCHEMA

identifier

n

table schema

TABLE_NAME

identifier

n

table name

COLUMN_NAME

identifier

n

column name

ORDINAL_POSTION

short

n

ordinal position of the column element inside the containing key

CONSTRAINT_TYPE

enumeration

n

contains zero or more of the following attributes: INDEX, PRIMARY, UNIQUE