Good understanding of sql command
understanding of create new table in sql
Good understanding of operator in sql such as Arithmatic operator,Relational operator,Logical operator,Special operator
Good understanding of GROUP Functions and Grouping as like Sum,Max,Min,Avg,Count.
Good understanding of Statements as like DDL,DML,TCL
Good understanding of Sub-query
Good understanding of types of join Cartesian join,inner join,outer join,Self join
Good understanding of Functions.
as like Character function,Numeric function,Date function,Special function
Good Understanding of Linux Command.