I heard that foo is used as a table alias but why is it needed? ex. When I try to run the code on pgadmin4 it doesn work without the foo and says that ...

when I execute the whole code then this happens. ERROR: subquery in FROM must have an alias HINT: For example, FROM (SELECT ...) [AS] foo. ...

This is what I did and I got: SQL Error [42601]: ERROR: syntax error at or near "AS" This case below is working but I don't get why I cannot use ...

As you can see, the beginning and the end of the week are selected with this code. I'm new to sql and I understand what's going on here in general, bu ...

When I simply try to retrieve all of the rows in my table EMPLOYEE like this: I get the following error: If I remove the AS emp it works just pe ...

I find answers below: Select round(S.LAT_N,4) mediam from station S where (select count(Lat_N) from station where Lat_N < S.LAT_N ) = (select count ...

I have this query which runs on MsSQL: How do I convert it to work with Oracle data base type? ...

My query is : I need to expand this query even more with where clause. But this itself is throwing, ORA-00904 : invalid identifier error. ...

I'm working with some SQL and trying to understand what is going on. Within the select there are what seem like variables s.id s.status What are t ...

My command worked and when I tried inserting it again, I keep getting this error: Every derived table must have its own alias.. This is my command: ...

I am trying using the following query on a POSTGIS (Postgres) Database. The original question: https://gis.stackexchange.com/questions/313252/postgis- ...

I being asked in exercise to calculate three values from two columns, List_price and discount_amount. partly some of my issue is that my programming i ...

I'm trying to lend some help to a hobbyist friend, using SQL Server experience to help with MySQL. He's working on a game database. I wrote this quer ...

I tried this: I get this error: When I remove AS a and the WHERE a.RowNumber = 1; the query works fine. Is there a reason I can't assign the ...

I'm having trouble understanding the following example from the PostgreSQL documentation: The things inside the parentheses of the t(...) become th ...

this query generate bellow error: ORA-00904: "UPP"."TPT_CUO_NAM": invalid identifier 00904. 00000 - "%s: invalid identifier" ...

I am trying to write a simple SQL query with Left Join. This is the query: Second table alias is TOTAL_LINES. When running it, I get an error ...

I am trying to run the below update but running into the "table is ambiguous" error. The table dbo.a contains data to update a value in cg based on ...

I am baffled as to why selecting my SQL View is so slow when using a table alias (25 seconds) but runs so much faster when the alias is removed (2 sec ...

I'm using eclipse link as JPA implementation. I have a named Query like this: The resulting SQL query will actually query over 4 tables that get ta ...