MySQL select from two concatenated strings not working
I’m trying to select the data from a table called t32 with the following code:
SELECT timestamp AS "time", id FROM CONCAT('t', "32") However the following error appears:
#1064 - Fehler in der SQL-Syntax. Bitte die korrekte Syntax im Handbuch nachschlagen bei '("t", "32") LIMIT 0, 25' in Zeile 4 free translation to english:
#1064 - Error in SQL syntax. Please look up the correct syntax near '("t", "32") LIMIT 0, 25' in line 4 However if I use
SELECT timestamp AS "time", id FROM t32 everything works like expected.
about help i would be very happy
You are trying to construct a table name in a SQL query. You cannot do this with a regular SQL query.
One solution is dynamic SQL — that is a prepare and exec approach.
However, this really suggests a problem with your data model. In general, constructing table names should not be necessary. All data about a single entity should be in a single table.
So, the query should look more like:
select t.* from t where <somecol> = 32; 
