Sql Server 2012 error 8120. group by error on a simple select query
127641
GROUP BY / aggregate function confusion in SQL
20588
mysql - ERROR 1064 (42000) when using keywords as column name
137984
How do I use "GROUP BY"?
30078
How do I perform a GROUP BY on an aliased column in MS-SQL Server?
132552
ORA-00918: column ambiguously defined in SELECT *
71713
PostgreSQL - "DISTINCT ON" and "GROUP BY" syntax
83406
''More than one row returned by a subquery used as an expression'' postgres error
98720
SQL - using alias in Group By
127084
Returning the 'last' row of each 'group by' in MySQL
21053
How to use GROUP BY to concatenate strings in MySQL?
58304
Why are queries parsed in such a way that disallows the use of column aliases in most clauses?
21426
How to use GROUP BY to concatenate strings in SQL Server?
10795
Why does ANSI SQL define SUM(no rows) as NULL?
68701
Query works in SQL Server 2005 but syntax error for SQL Server 2000
126717
How to approach GROUP BY in PostgreSQL using Rails?
63173
PHP & MYSQL: using group by for categories
152843
"Ambiguous column name" error on one particular server