Which is faster union or join?
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How many types of triggers exist in pl/sql?
how mysql optimizes distinct? : Sql dba
How to test for null values?
I have a table .in the table 100 recored is there .we have get the single row with out using clause..
What is difference between ms sql and mysql?
Is sql a backend language?
If an unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE?
What are sql ddl commands?
If we declare constraints Unique and Not null on a single column then it will act as a Primary key, so what is the use of primary key??
What is difference between function and trigger?
what are date and time intervals? : Sql dba
What are code pages ?