Method union

jOOQ/src/main/java/org/jooq/Select.java:144–144

Apply the UNION set operation. In SQL, a UNION is DISTINCT by default, meaning, duplicates are removed from the result set. So, this is the same as #unionDistinct(Select). If duplicate removal isn't required, or already guaranteed by the data model,

(Select<? extends R> select)

     *             {@link StackOverflowError} when generating the SQL.
     */
    @NotNull @CheckReturnValue
    @Support
    Select<R> union(Select<? extends R> select);