I am joining 2 large queries (155 columns) in a 'union all'. I have verified that the column names and datatypes are the same on each side of the unio ...
I am joining 2 large queries (155 columns) in a 'union all'. I have verified that the column names and datatypes are the same on each side of the unio ...
I'm trying to union three tables, each of which should have the same columns with the same data types: I keep getting "ORA-01790: expression must h ...
I'm using Entity-Framework with oracle. I have a table 'Person' and a linking table 'Manager' that have 2 columns that are FK to 'Person' table. (th ...
Using Oracle 11g release 2, the following query gives an ORA-01790: expression must have same datatype as corresponding expression: The error sugge ...
I have two select statements joined by "union". While executing that statement I've got: Error report: SQL Error: ORA-01790: expression must have sam ...