A constraint is a condition that has to be fulfilled in a given context.
Is it possible to drop all NOT NULL constraints from a table in one go? I have a big table …
sql postgresql constraints sql-drop notnullI am having trouble with this table CREATE TABLE `Participants` ( `meetid` int(11) NOT NULL, `pid` varchar(15) NOT NULL, `status` char(1) …
mysql sql database constraints check-constraintsI can get a list of unique constraints fairly easily with the following query: select * from INFORMATION_SCHEMA.TABLE_CONSTRAINTS …
sql-server tsql metadata constraintsI'm trying to implement a UITableView that will behave similarly to the timeline of a twitter client. Right now I'm …
ios objective-c uitableview constraints autolayoutHello I am trying to display the constraints in one of my tables but for some reason I get the …
sql oracle constraints sqlplusI have written the following constraint for a column I've called 'grade': CONSTRAINT gradeRule CHECK grade IN (‘easy’, ‘moderate’, ‘difficult’), …
sql constraints sql-updateIs there a way to set a SQL constraint for a numeric field that min value should be 1234 and max …
sql constraintsI have a table with a column that contains a few null values. I want to add a NOT NULL …
sql oracle plsql oracle11g constraintsThis is what I'm trying to do: I have 2 tables... CREATE TABLE `parent` ( `id` int(11) NOT NULL AUTO_INCREMENT, `data` …
mysql foreign-keys constraints auto-increment database-relationsI have a field that stores product codes. The codes are unique, but some products simply doesn't have a code. …
mysql database-design constraints