SHOW INDEXES is to query the table's index present in the database where it has been assigned some index constraints.
SHOW INDEXES FROM table_name;
The table name has to be specified to fetch the index information. FROM does this.
We can also fetch index information off of a table with a database name.
SHOW INDEXES FROM table_name
SHOW INDEXES FROM database_name.table_name;
Let us check if these works in real-time.
We have a rec table where the email and name columns are indexed with unique constraints.
Let us check the index information in this table.
SHOW INDEXES FROM rec;
We have primary, unique indexed to this table.
SHOW INDEXES FROM rec
The same action can be expected when used.