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What are sql ddl commands?
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How to get second highest salary from a table
2. Select A.A from ( select 1 as from dual Union select 1 as from dual)A Full outer join ( select 1 B from dual Union select 2 B from dual)B On A.A=B.B
write a query to delete similar records in particular fields(columns) in different tables
What is the need of a partition key?
Why stored procedure is better than query?
Name the different types of indexes in sql and define them.
What does pragma mean?
What is the use of time stamp in select statement?
If the application is running very slow? At what points you need to go about the database in order to improve the performance?
State some properties of relational databases?
Can we use rowid as primary key?
Can 2 queries be executed simultaneously in a distributed database system?
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