Yes, but few exceptions; Column level constraints are applicable to that column only, whereas table level constraints are used to define composite keys like primary key for the combination of two or more columns in a table.
column level constraints contain all types of constraints (like, not null,primary key,foreign key,unique).but table level except not null constraint its supports all constraints. --Prabhat On Fri, Jun 25, 2010 at 2:45 PM, Johan De Meersman <vegiv...@tuxera.be>wrote: > A Primary key constraint can be defined at various levels: >> >> * Primary key constraint defined at column level >> Syntax: <Column Name> <datatype>(<size>) Primary Key >> * Primary key constraint defined at table level >> Syntax: Primary key (<Column Name>, <Column Name>) >> > > > Aren't those two alternate syntaxes for the exact same thing ? > > -- > Bier met grenadyn > Is als mosterd by den wyn > Sy die't drinkt, is eene kwezel > Hy die't drinkt, is ras een ezel > -- Best Regards, Prabhat Kumar MySQL DBA Datavail-India Mumbai Mobile : 91-9987681929 www.datavail.com My Blog: http://adminlinux.blogspot.com My LinkedIn: http://www.linkedin.com/in/profileprabhat
