(B)0[m
[1mcol-definition = [m
[1m [m
[1mqq> <column-name> qqk [m
[1m lqqqqqqqqqqqqqqqj [m
[1m tqqq> column-type qqqwqqqqqqqqqqqqqqqqqqqqqqqqqqwqwqqk [m
[1m x [m [1m tq>[1;4mDEFAULT[m[1m [m [1m value-expr [m [1m x x x [m [1m [m
[1mx[m [1mmq>column-identity qqqqqqqqj[m [1mx[m [1mx[m
[1m mqqq> [1;4mCOMPUTED[m[1m [1;4mBY[m[1m value-expr qqqqqqqqqqqqqqqqqqqqqj[m [1mx[m
[1m lqqqqqqqqqqqqqqqqqqqqqqqqq<qqqqqqqqqqqqqqqqqqqqqqqqqqj [m
[1mmqwqqqqqqqqqqqqqqqqqqqqwqqqqqqqqqqqqqqqqk[m
[1mmq>[m [1mcol-constraint qqj[m [1mx[m
[1mlqqqqqqqqqqqqqqqqqqqqqqqqqq<qqqqqqqqqqqqj[m
[1m mwqqqqqqqqqqqqqqqqqqqqqqqqwqqqqqwqqqqqqqqqqqqqqqqqqqqqqqwq>[m
[1m mq> comment-is-clause [m [1mqqj mq> sql-and-dtr-clause qj [m
[1m [m
[1m [m
[1m [m
The definition for a column in the table. SQL gives you two ways
to specify column definitions:
o By directly specifying a data type to associate with a column
name
o By naming a domain that indirectly specifies a data type to
associate with a column name
Either way also allows options of specifying column constraints
and formatting clauses.