The following example returns all rows that contain at least one numerical digit in Oracle Database.
Oracle
Find All Non-Numeric Values in a Column in Oracle
If you ever encounter a character column that should be a numeric column, there’s always a possibility that it contains non-numeric data that you don’t know about.
In Oracle Database, you can run a query like the following to return non-numeric data from the column.
Fix Error “ORA-01790: expression must have same datatype as corresponding expression”
If you’re getting the error “ORA-01790: expression must have same datatype as corresponding expression” in Oracle Database, it’s probably because you’re using an operator such as UNION, INTERSECT, or EXCEPT to run a compound query, but the columns returned by each query use different data type groups.
To fix this issue, you’ll need to ensure that each column returned by the second query uses the same data type group as the corresponding column in the first query.
6 Ways to Select Duplicate Rows in Oracle
The following examples return duplicate rows from an Oracle Database table.
Oracle MINUS Operator Explained
In Oracle Database, the MINUS operator is used to return only unique rows returned by the first query but not by the second.
4 Ways to Find Rows that Contain Uppercase Letters in Oracle
Here are four options for returning rows that contain uppercase characters in Oracle Database.
2 Ways to Return Rows that Contain Only Non-Alphanumeric Characters in Oracle
Below are two methods for returning rows that only contain non-alphanumeric characters in Oracle Database.
Alphanumeric characters are alphabetic characters and numeric characters.