How can I delete duplicate rows?
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wirte a query to filter improper date format follwing table? date 20-apr 22-may-2010 26-jun-2010 feb-2009 i want the output date 22-may-2010 26-jun-2010
How to add a column ‘salary’ to a table employee_details?
what is sql? : Sql dba
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4 Answers Cap Gemini, Infosys, TCS,
Does indexing improve query performance?
1. what is the exact use of hint in sql. 2. How we can avoid index scan in sql even though index is there in the table.
If we have n no of columns in a table, can we add new column in that table with not null constraint?
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