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Does the number of columns in a table can affect the performance

DassPrabuJul 13 2015 — edited Jul 13 2015

Does the number of columns in a table can affect the performance. Consider i have 250 columns in a table , while joining with some other table to retrive the data what would be the impact.

How the performance would be if i just select 5 columns from the table have 250columns.

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Locked on Aug 10 2015

Added on Jul 13 2015

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