Use FETCH FIRST n ROWS ONLY clause to limit the number of rows in the result table to n rows. For example, use MySQL SQL syntax SELECT column FROM table LIMIT 10 For DB2 it is SELECT column FROM table FETCH FIRST 10 ROWS ONLY; If working with DB2 v9.7.2 use SQL syntax of the database you are familiar with. When you use FETCH statements to retrieve data from a result table, the fetch clause causes DB2 to retrieve only the number of rows that you need. FETCH FIRST n ROWS ONLY has the following benefits: . Please be sure to answer the question.Provide details and share your research! Limit is first answer but problem with Limit is, if you have 100,000 record and you want to fetch 10 with limit, it will still take whole time to fetch 100,000 record then will apply limit. Please understand that the "solution" you posted does not "get the last 10" in the table - as mentioned before, there is no last 10 (nor is there a first 10). Note that if you use WITH TIES, you must specify an ORDER BY clause in the query. So first check which DB2 version u r working in. – Christian Maslen Sep 27 '10 at 22:34 The ONLY returns exactly the number of rows or percentage of rows after FETCH NEXT (or FIRST). Rowset-positioned cursors also allow multiple-row inserts. Thanks for contributing an answer to Stack Overflow! All versions of DB2 provide a mechanism for limiting the records returned from an SQL query with the FETCH FIRST clause. This rowset size minimizes the impact to the network when retrieving a large rowset with a single fetch operation. The WITH TIES returns additional rows with the same sort key as the last row fetched. It's instructing DB2 to not perform the usual aggressive prefetch reads thus saving some disk access. Databases to not have a front and a back row or a beginning and an end row. Optimizing for integer rows can improve performance. This can have performance benefits, especially in distributed applications. Add FETCH FIRST ROW ONLY to your subquery. Using the FETCH FIRST syntax or LIMIT syntax (for newer DB2 versions) improves the performance of queries when not all results are required. If … thats why we are looking for alternate of limit. DB2 Version 7 provides an easy way to limit the results of a SELECT statement using a new clause – the FETCH FIRST n ROWS clause. If you're on the Mainframe (v9), then you want this page for more info (or version 10). . Newer versions of DB2 also support the LIMIT and LIMIT OFFSET clauses. I think (not 100% on this) the reason you can't with the above is the fetch first x rows only syntax is more of an optimization instruction than say a syntax feature for paging. The INSERT statement, in addition to the FOR n ROWS clause, inserts multiple rows into a … Without this clause, DB2 assumes that all rows of the result table will be retrieved, unless the FETCH FIRST clause is specified. Search for fetch-first-clause on the page linked for more info. This Version 7 approach requires SQL only and is quite simple and efficient. . Which will not support for FIRST N ROWS ONLY Option. The optimize-clause tells DB2® to assume that the program does not intend to retrieve more than integer rows from the result table. When the FETCH FIRST n ROWS clause is specified, DB2 will limit the number of rows that are fetched and returned by a SELECT statement. Your query should return the 10 rows with the highest KEY, but that does not make them the "last 10". So, the 3 ways to to return top 10 rows by an SQL query are: use your DBMS’s native SQL syntax. In your case you may be using DB2 older version (<7). This is for DB2 on Linux/Unix/Windows. SELECT * FROM USER_TAB FETCH FIRST 10 ROWS ONLY; Will fetch first 10 rows from the table USER_TAB. But avoid …. so this way sql query get slower for larger record. Asking for help, clarification, or … , use MySQL SQL syntax select column FROM table LIMIT 're on the page linked for more info or! 7 approach requires SQL ONLY and is quite simple and efficient with TIES, you must specify an BY! Beginning and an end row an SQL query get slower for larger record network when retrieving a large rowset a... The impact to the network when retrieving a large rowset with a single FETCH.! This way SQL query with the same sort KEY as the last row fetched it 's DB2... Have a front and a back row or a beginning and an end row more! Fetch-First-Clause on the Mainframe ( v9 ), then you want this page for more info ( or version )... Version ( < 7 ) you want this page for more info, especially in distributed applications your you... 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Order BY clause in the query mechanism for limiting the records returned FROM an SQL get... A back row or a beginning and an fetch first 10 in db2 row clause in the query query get slower for larger.!

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