Filter data using wildcards

Operator + [wildcard like '_%'} composition fuzzy query

For example, the query trade names beginning with jet goods:

select prod_id,prod_name
from products
where prod_name like 'jet%';

查询的结果是：
prod_id         |    prod_name
100                |    jetpack    155
101                |    Jetpook    159
120                |    Jetllllack    165

因为设置了不区分大小写所以就会查出来J和j

For example, the query trade names ending with jet goods:

select prod_id,prod_name
from products
where prod_name like '%jet';

查询的结果是：
prod_id         |    prod_name
100                |    pack jet   155
101                |    pookJet    159
120                |    llllackJet    165

因为设置了不区分大小写所以就会查出来J和j

For example, the query trade names include jet letters of goods:

select prod_id,prod_name
from products
where prod_name like '%jet%';

查询的结果是：
prod_id         |    prod_name
100                |    pack jetpack    155
101                |    pookJetpook    159
120                |    llllackJetllllack    165

因为设置了不区分大小写所以就会查出来J和j

Wildcard tips

Wildcard longer processing time is generally spent on search, so remember:
- Do not overuse wildcards, if other operators can achieve the purpose, you should use other wildcard

• When it does require the use of wildcards, unless absolutely necessary, do not put them in charge for the start of the search pattern. The wild card is placed at the beginning of the search pattern, searching up is the slowest.

- Carefully note the position of the wildcard, if misplaced, may not return the desired data.