SQL - Delimiting to a Specific Range

Question

SELECT * FROM `cpus_z-series` WHERE `Model_ID` LIKE '%Z5%';

The above SQL query would target both 500 and 5000 series. I want to know if there's a way to delimit this further to select only 500 or only 5000 series models. No matter how many percentage signs I add to the end, the same happens.

I'm assuming this might be possible using RegEx, but I'm not that great with regular expressions.

Edit:

I forgot to mention that the model numbers overlap. For example, Z550 exists, but so does Z5500. And furthermore, there are model numbers with awkward endings, like Z552 and Z5505.

Answer 1

First, why do you have the wildcard at the front? Wouldn't this do the same thing?

WHERE `Model_ID` LIKE 'Z5%';

If so, you can just use the length of the string:

WHERE `Model_ID` LIKE 'Z5%' AND LENGTH(Model_ID) = 4

Of course, you can also use regular expressions. However, the advantage of using this method is that it can actually take advantage of an index on Model_Id , because the LIKE pattern starts with a fixed character.

Also, you can use _ to represent any single character in like :

WHERE `Model_ID` LIKE 'Z5__'

This is probably closest to what you want to do.

Answer 2

To select only 5xx models

SELECT * 
FROM `cpus_z-series` 
WHERE `Model_ID` REGEXP '^Z5[0-9]{2}$'

Answer 3

you can limit it using _ underscore

SELECT * FROM cpus_z-series WHERE Model_ID LIKE '%Z5__';

two underscore for hundred and 3 underscore for thousand