Question : error message ORA-01691

"error message ORA-01691 resources.sys" how do i create more tablespace?

Answer : error message ORA-01691

This is the correct regular expression.
TerryAtOpus, your RegEx will fail in Example 3!
ozo, you've spoiled TerryAtOpus' RegEx instead of fixing it!

1:	(?:(?=.*PETS)|(?<=PETS.*))(?:DOGS|CATS|GOLDFISH)