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what is a unique key ? : Sql dba
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If a procedure within a package is invalidated whether the entire package will be invalid and has to be recompiled again?
using cursors salesman get bonus as 10% of their salary , managers get 20% , analalist get 30%. generae a report showing the employee name, salary , bonus.
what is timestamp in mysql? : Sql dba
how to retrieve last tree records from table? select *from emp where rownum > (select count(*)-3 from emp); i am using this query to get last three records from table but its not giving any output, so please tell me what is the error in this query.
define a variable representing the expression used to calculate on emps total annual remuneration.use the variable in a statement which finds all emps who can earn 30000 a year or more.
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