简单的选择查询不起作用？

Question

PROVINCE -- varchar(25) 

SELECT * FROM listings WHERE PROVINCE='Bakersfield'

Returns empty resultset when entries with Bakersfield as province exist

I am pretty unsure as to why. When I remove the WHERE it works.

BTW I am running this in phpmyadmin, where it lets one execute SQL statements

In phpmyadmin it shows ... beneath the equals sign. I am not sure why. That may be a hint.

Answer 1

If

SELECT * FROM listings WHERE PROVINCE like '%Bakersfield%'

works for you then you have spaces in your data. You can remove them with

update listings
set PROVINCE = trim(PROVINCE)

See TRIM()

After that you should check your code where you insert the data. Check why there are spaces inserted and fix it.

Answer 2

Change you equal = to LIKE operator

SELECT * FROM listings WHERE PROVINCE LIKE 'Bakersfield'

This should solve your issue. If you want to find places that includes your string simply surround it with wildcards %..%

SELECT * FROM listings WHERE PROVINCE LIKE '%Bakersfield%'

Answer 3

SELECT * FROM listings WHERE PROVINCE='Bakersfield'

There is no point the abpve query doesnt work if the follwing case is not the problem.

1) If case is the prob then use upper or lower

SELECT * FROM listings WHERE upper(PROVINCE)=upper('Bakersfield');

2) If extra space is the problem use replace or Trim

SELECT * FROM listings WHERE replace(PROVINCE,' ','') ='Bakersfield'

There might be sum other seniario if not then use "Like " key word as suggested by others. :)