Is left join and outer join same?
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what is 'force view'?
What is the difference between Union and Union all. Which is faster.
What is not equal in sql?
How does a trigger work?
How is indexing done in search engines?
Which is better trigger or stored procedure?
What is sql performance tuning?
Is sqlite free?
what is transaction? : Sql dba
Is it possible to update views?
Create table emp (id number(9), name varchar2(20),salary number(9,2)); The table has 100 records after table created.Now i nee to change id's Datatype is to be Varchar2(15). now Alter table emp modify(id varchar2(15),name varchar2(20), salary number(9,2)); Whether it will work or returns error? post answer with explanation.
How do I remove duplicates in two columns?
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