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what is index? : Sql dba
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I have a table with 1 million records out of which 10,000 records are of unique records, then if I will implement index, then which type of index shall I use and why shall I use?
i have one table with accounts and amounts as colums.accounts with columns c and d. and amounts with values 1000,2000,3000 for c and 4000,5000,8000 for d.i need to find the sum of these accounts c and d individually and find the differences between their sum using one select statement.
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