In MySQL, SHOW TABLES is an administrative statement that lists the non-TEMPORARY tables and views in a given database.
SHOW TABLES only lists the tables and views for which you have privileges.
DBMS
Database Management Systems
2 Ways to Return Rows that Contain Only Alphanumeric Characters in MariaDB
Below are two methods for returning rows that only contain alphanumeric characters in MariaDB.
Alphanumeric characters are alphabetic characters and numeric characters.
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.
Fix Error 1064 (42000) when using the MINUS Operator in MariaDB
There are at least a few possible reasons you might be getting the dreaded error 1064 (42000) that reads “You have an error in your SQL syntax…” etc when trying to use the MINUS operator in MariaDB.
I’ll explore these below and offer some solutions.
MySQL UNION Clause
In MySQL, the UNION clause combines the results from multiple queries into a single result set.
6 Ways to Select Duplicate Rows in Oracle
The following examples return duplicate rows from an Oracle Database table.