unique constraint with multiple null
i have a table with empid identity column and empcode varchar. i want to be able to allow muiltiple null on empcode and also mantian unique empcode
View ArticleDefine UNIQUE Constraint on Composite Key
How would I be able to define a Unique constraint on a composite PK which consists of 6 different columns? I am having some trouble inserting data into this table because of a PK constraint. Since it's...
View ArticleUnusual Unique Constraint Issue
I have a table with three columns. First being the PK, second being a FK to another table and the third being a column with a Unique Constraint, nonclustered. When I inserted into this table, my insert...
View Articlewhat is the advantage of giving null value to unique constrain
what is the advantage of giving null value to unique constraint ?
View Articleunique constraint with multiple null
i have a table with empid identity column and empcode varchar. i want to be able to allow muiltiple null on empcode and also mantian unique empcode
View ArticleDefine UNIQUE Constraint on Composite Key
How would I be able to define a Unique constraint on a composite PK which consists of 6 different columns? I am having some trouble inserting data into this table because of a PK constraint. Since it's...
View ArticleUnusual Unique Constraint Issue
I have a table with three columns. First being the PK, second being a FK to another table and the third being a column with a Unique Constraint, nonclustered. When I inserted into this table, my insert...
View Articlewhat is the advantage of giving null value to unique constrain
what is the advantage of giving null value to unique constraint ?
View ArticleValidations before insert/update the data
Is there a way to check whether data exists in a table before I INSERT data into the table? I need to check whether the same data already exists. If it does exist then I need an error raised. If not,...
View ArticleCannot insert duplicate key row in object with unique index the duplicate key...
Hello Experts ,one of our developer getting this error :Exception: com.microsoft.sqlserver.jdbc.SQLServerException: Cannot insert duplicate key row in object 'dbo.nsIdentity' with unique index...
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