What is a unique constraint?
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Differentiate between pl/sql and sql?
Is it possible to use LONG columns in WHERE clause or ORDER BY?
What is the use of nvl function?
how to get a list of all tables in a database? : Sql dba
How to delete same emp id in sql query for exmaple in emp table emp id, empname, emp address. for example emp id =5, repeated in two times in rows same id how to delete same empid please any one of the write query send in my id
Does sql support programming?
what is csv? : Sql dba
what is cursor procedure
How do you truncate?
How do I tune a sql query?
Can you have more than one key in a database?
what is difference between "Primary key" and "Unique key"?