Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in?
1238
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc... expects parameter 1 to be resource
132601
PHP PDOException: "SQLSTATE[HY093]: Invalid parameter number"
148619
Is there a reason not to use  (null safe equals operator) in mysql instead of =?
17091
How can I fix MySQL error #1064?
137483
How to get number of rows affected, while executing MySQL query from bash?
14587
Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource
55198
Warning: mysqli_close() expects exactly 1 parameter, 0 given in
1017
Is MySql's LAST_INSERT_ID() function guaranteed to be correct?
78636
Column name or number of supplied values does not match table definition. What shoul I do?
72189
ROW_NUMBER() in MySQL
37685
queries with db_select don't respect integers
85308
What does the error "Ambiguous column name 'id'" mean?
46432
What is the "N+1 selects problem" in ORM (Object-Relational Mapping)?
49552
Warning: mysql_result() [function.mysql-result]: Unable to jump to row 0 on MySQL result index 5 in profile.php on line 11
12286
Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given in
89999
java.sql.SQLException Parameter index out of range (1 > number of parameters, which is 0)
94931
Mysql_real_escape_string() Warning Confusion