what are the differences between char and varchar? : Sql dba

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Display the total debit counts, total credit counts, sum of total debits, sum of total credits from an employee's transaction table (a single table) containing the following columns. Transaction_number Transaction_amount Transaction_date Transaction_type --> tells if the amount is a credit or a debit. As the query alone is important, the table is left with specifying just the field's name. Pls help me with this query.

3 Answers   iNautix, Oracle,

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Is it possible to read/write files to-and-from PL/SQL?

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How does cross join work in sql?

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Does sap use sql?

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If we update a complex view, is base table will get update ?

2 Answers   Ardee Technologies, HCL,

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What is clustered and nonclustered index in sql?

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How to assign sql query results to pl sql variables?

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What are aggregate and scalar functions?

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What is a bitmap index?

4 Answers   Choice Solutions, Infosys,

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What does select count (*) mean in sql?

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What is sql profiler in oracle?

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