You need to use HAVING, not WHERE. The difference is: the WHERE clause filters which rows MySQL selects. Then MySQL groups the rows together and aggregates the numbers for your COUNT function. HAVING is like WHERE, only it happens after the COUNT value has been computed, so it’ll work as you expect. Rewrite your subquery as:
Update: This answer covers the general error classification. For a more specific answer about how to best handle the OP’s exact query, please see other answers to this question In MySQL, you can’t modify the same table which you use in the SELECT part.This behaviour is documented at: http://dev.mysql.com/doc/refman/5.6/en/update.html Maybe you can just join the table … Read more
SQL supports qualifying a column by prefixing the reference with either the full table name: …or a table alias: The table alias is the recommended approach — why type more than you have to? Why Do These Queries Look Different? Secondly, my answers use ANSI-92 JOIN syntax (yours is ANSI-89). While they perform the same, … Read more
See MySQL C API function mapping: http://mysql-python.sourceforge.net/MySQLdb.html
SQL supports qualifying a column by prefixing the reference with either the full table name: …or a table alias: The table alias is the recommended approach — why type more than you have to? Why Do These Queries Look Different? Secondly, my answers use ANSI-92 JOIN syntax (yours is ANSI-89). While they perform the same, … Read more
MYSQL_HOME variable value:C:\Program Files\MySQL\MySQL Server 5.0\bin %MYSQL_HOME%\bin See the problem? This resolves to a path of C:\Program Files\MySQL\MySQL Server 5.0\bin\bin
TL;DR TEXT fixed max size of 65535 characters (you cannot limit the max size) takes 2 + c bytes of disk space, where c is the length of the stored string. cannot be (fully) part of an index. One would need to specify a prefix length. VARCHAR(M) variable max size of M characters M needs to be between 1 and 65535 takes … Read more
Try either multi-table update syntax Here is SQLFiddle demo or conditional update Here is SQLFiddle demo
If you are using ubuntu, you have to use the following steps to avoid this error(if there is no replication enabled): run the command vim /etc/mysql/my.cnf comment bind-address = 127.0.0.1 using the # symbol restart your mysql server once. Update In Step 1, if you cannot find bind-address in the my.cnf file, look for it in /etc/mysql/mysql.conf.d/mysqld.cnf file. Update in case of MySQL replication enabled … Read more
The SQLite command line utility has a .schema TABLENAME command that shows you the create statements.