Question

I’m using a prepared statement with this SQL code:

SELECT `name` FROM `securities` WHERE `symbol`=? AND `type`=`C`

but I keep getting this error when I execute it:

Column not found: 1054 Unknown column 'C' in 'where clause'

The table is set up like this:

+--------+-----------------------+------+------+
| symbol | name                  | type | used |
+--------+-----------------------+------+------+
| AED    | UAE Dirham            | C    | 0    |
| ALL    | Albanian Lek          | C    | 0    |
| ANG    | Neth Antilles Guilder | C    | 0    |
| ARS    | Argentine Peso        | C    | 0    |
| AUD    | Australian Dollar     | C    | 0    |
| AWG    | Aruba Florin          | C    | 0    |
| BBD    | Barbados Dollar       | C    | 0    |
| BDT    | Bangladesh Taka       | C    | 0    |
| BGN    | Bulgarian Lev         | C    | 0    |
| BHD    | Bahraini Dinar        | C    | 0    |
+--------+-----------------------+------+------+

and I’m trying to query just the name from it. How can I fix this error? The code that involves binding a value is too long to post, but basically, it executes the prepared statement with array($symbol). Is there an SQL error that I’m missing?

Answer 1

You have the value C enclosed in backticks. This should only be done for column and table names, not values.

Change it to quotes and it should work:

SELECT `name` FROM `securities` WHERE `symbol`=? AND `type`='C'