Paginating SQL queries with Oracle 12c

Oracle 12c not only allows to create TOP N queries with an understandable syntax, the row limiting clause also makes it possible to paginate a result set:

create table tq84_table ( id number, txt varchar2(10) ); insert into tq84_table values ( 2, 'two' ); insert into tq84_table values ( 1, 'one' ); insert into tq84_table values ( 6, 'six' ); insert into tq84_table values ( 8, 'eight'); insert into tq84_table values ( 3, 'three'); insert into tq84_table values ( 7, 'seven'); insert into tq84_table values ( 4, 'four' ); insert into tq84_table values ( 9, 'nine' ); insert into tq84_table values (10, 'ten' ); insert into tq84_table values ( 5, 'five' );

select id, txt from tq84_table order by id offset 4 rows -- skip first 4 records fetch next 3 rows only -- fetch next 3 records ;

returns

ID TXT ---------- ---------- 5 five 6 six 7 seven

Links

SQL statement on github

TOP N select queries with Oracle 12c

With Oracle 12c, it's possible, finally, to do TOP n select queries with an easily understandable syntax.

Here's a table to demonstrate it:

create table tq84_table ( id number, txt varchar2(10) ); insert into tq84_table values ( 2, 'two' ); insert into tq84_table values ( 1, 'one' ); insert into tq84_table values ( 6, 'six' ); insert into tq84_table values ( 8, 'eight'); insert into tq84_table values ( 3, 'three'); insert into tq84_table values ( 7, 'seven'); insert into tq84_table values ( 4, 'four' ); insert into tq84_table values ( 0, 'zero' ); insert into tq84_table values ( 9, 'nine' ); insert into tq84_table values (10, 'ten' ); insert into tq84_table values ( 5, 'five' ); commit;

Now, a select statement with fetch first row only:

select id, txt from tq84_table order by id fetch first row only;

selects

ID TXT ---------- ---------- 0 zero

Links

Paginating SQL queries with Oracle 12c

SQL on github