How to use SQL query to define table in dbtable?

Question

In JDBC To Other Databases I found the following explanation of dbtable parameter:

The JDBC table that should be read. Note that anythin

Answer 1

Code In Scala

val checkQuery = "(SELECT * FROM " + inputTableName + " ORDER BY " + columnName + " DESC LIMIT 1) AS timetable"

val timeStampDf = spark.read.format("jdbc").option("url", url).option("dbtable", checkQuery).load()

Adding an alias is also necessary after the query in parenthesis.