rules--------------------------------------------------------------------------------DescriptionSpecifies which dividing lines are displayed (inner borders). Syntax object.rules[ = rules] SettingsThis read-write property takes one of these string values: all Displays a border on all rows and columns. cols Displays borders between all table columns. groups Displays horizontal borders between all table groups. Groups are specified by the THEAD, TBODY, TFOOT, and COLGROUP elements. none Removes all interior table borders. rows Displays horizontal borders between all table rows. The property is not set by default. Applies ToTABLE, stylesheetSee Also frame
嘿嘿,我也曾经不太清楚select * from table1 where a in (select a from table2) 其实是个子查询,但这的确是个子查询;创建规则支持in运算符,但只限于in(1,2,3)之类,一旦加上select语句,就是子查询了。
object.rules[ = rules]
SettingsThis read-write property takes one of these string values: all Displays a border on all rows and columns.
cols Displays borders between all table columns.
groups Displays horizontal borders between all table groups. Groups are specified by the THEAD, TBODY, TFOOT, and COLGROUP elements.
none Removes all interior table borders.
rows Displays horizontal borders between all table rows.
The property is not set by default. Applies ToTABLE, stylesheetSee Also
frame
其实是个子查询,但这的确是个子查询;创建规则支持in运算符,但只限于in(1,2,3)之类,一旦加上select语句,就是子查询了。
你也就是说他不支持子查询?
但是我看了其他资料,,
其他数据库系统的规则可以支持子查询的。