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Database Administration (MOSC)

Difference between count(1) and count(*) in sql

Apr 2, 2012 11:12PM edited Apr 3, 2012 1:30AM in Database Administration (MOSC) 4 commentsAnswered

Team,

OS = Linux As 4

DB = 10.2.0.5.0

Could you please tell me the exact difference between below statement in terms of performance ?

SQL> select count(1) from NUR;

COUNT(1)

----------

272242796

SQL> select count(*) from NUR;

COUNT(*)

----------

272242796

SQL> select count(0) from NUR;

COUNT(0)

----------

272242796

Thanks,

Harry

0

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