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(mysql.info)mysql_num_rows

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`mysql_num_rows()'
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`my_ulonglong mysql_num_rows(MYSQL_RES *result)'

Description
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Returns the number of rows in the result set.

The use of `mysql_num_rows()' depends on whether you use
`mysql_store_result()' or `mysql_use_result()' to return the result
set.  If you use `mysql_store_result()', `mysql_num_rows()' may be
called immediately.  If you use `mysql_use_result()',
`mysql_num_rows()' will not return the correct value until all the rows
in the result set have been retrieved.

Return Values
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The number of rows in the result set.

Errors
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None.