How to properly use JOIN or GROUP By for ST_Union in PostgreSQL with PostGIS extension
108415
Using ST_Union in PostGIS
107680
How do I create a user-defined aggregate function?
102054
Is there an Oracle SQL query that aggregates multiple rows into one row?
77462
PGError: ERROR: column "p.name" must appear in the GROUP BY clause or be used in an aggregate function
145673
What does [FROM x, y] mean in Postgres?
155290
Subquery Returned More Than 1 Value with the Group By
98720
SQL - using alias in Group By
143452
PostgreSQL - fetch the row which has the Max value for a column
37566
How to create a SQL Server function to "join" multiple rows from a subquery into a single delimited field?
17181
How to write a query for exact pairs of groups
51714
One-to-many spatial join with results in one row
127641
GROUP BY / aggregate function confusion in SQL
147718
What is the purpose of PostGIS on PostgreSQL?
40249
How to use mysql JOIN without ON condition?
41719
SQL Row concatenation with XML PATH and STUFF giving aggregate sql error
78711
How do I generate a date series in PostgreSQL?
47978
Combining 2 views into one in PostgreSQL