onsider the following table

Table name: TENANT

$|$ ID $|$ NAME $|$ RENT $|$

$|18|$ Alex $|219|$

$|31|$ Rose $|250|$

$|51|$ Alex $|300|$

$|77|$ Mary $|280|$

$|81|$ Rose $|240|$

How many rows are in the following query?