How do you get the first 10 rows in DB2?

How do you get the first 10 rows in DB2?

To return only the rows of the employee table for those 20 employees, you can write a query as shown in the following example: SELECT LASTNAME, FIRSTNAME, EMPNO, SALARY FROM EMP ORDER BY SALARY DESC FETCH FIRST 20 ROWS ONLY; You can also use FETCH FIRST n ROWS ONLY within a subquery.

How do I limit rows in DB2?

To limit the number of rows in the result table of a query: Specify the FETCH FIRST n ROWS ONLY clause in the SELECT statement.

What is the limit of in clause in DB2?

what is the upper limit for predicate WHERE IN in DB2. AFAIK, an SQL statement in DB2 (LUW) can be up to about 2 MiB, so you could in principle have somewhere in the region of 250k terms in the IN clause, allowing 8 characters per term including the comma.

What is fetch in DB2?

The fetch-clause sets a maximum number of rows that can be retrieved. It specifies that an application does not want to retrieve more than fetch-row-count rows, regardless of how many rows there might be in the intermediate result table when this clause is not specified.

How do I use Fetch first?

FETCH FIRST specifies that only integer rows should be made available to be retrieved, regardless of how many rows there might be in the result table when this clause is not specified. An attempt to fetch beyond integer rows is handled the same way as normal end of data.

What is optimize for 1 row in Db2?

OPTIMIZE FOR 1 ROW tells Db2 to select an access path that returns the first qualifying row quickly. Use FETCH FIRST n ROWS ONLY clause to limit the number of rows in the result table to n rows.

What does limit 1 do in SQL?

This LIMIT clause would return 3 records in the result set with an offset of 1. What this means is that the SELECT statement would skip the first record that would normally be returned and instead return the second, third, and fourth records.

What is Rownum in DB2?

ROWNUM numbers the records in a result set. The first record that meets the WHERE clause criteria in a SELECT statement is given a row number of 1, and every subsequent record meeting that same criteria increases the row number.

How do I join two tables in DB2?

1. Inner join. You can use an inner join in a SELECT statement to retrieve only the rows that satisfy the join conditions on every specified table.
2. Left outer join. The LEFT OUTER JOIN clause lists rows from the left table even if there are no matching rows on right table.
3. Right outer join.
4. Full outer join.

How many columns can a DB2 table have?

Max number of columns in a table or view (depending on complexity of the view) or columns returned by a table function. 255 (this maximum limit is subject to additional limitations, depending on the number of partitions in the table space.

What is Multi row Fetch in Db2?

The multiple-row FETCH statement can be used to retrieve multiple rows from a table or view with a single FETCH statement. The program controls the blocking of rows by the number of rows requested on the FETCH statement (The Override Database File (OVRDBF) command has no effect.).

How do I join two tables in Db2?

How do I get last 10 rows in SQL?

mysql> SELECT * FROM ( -> SELECT * FROM Last10RecordsDemo ORDER BY id DESC LIMIT 10 -> )Var1 -> -> ORDER BY id ASC; The following is the output that displays the last 10 records.

How do I select top 10 rows in MySQL?

The SQL SELECT TOP Clause

1. SQL Server / MS Access Syntax: SELECT TOP number|percent column_name(s) FROM table_name.
2. MySQL Syntax: SELECT column_name(s) FROM table_name.
3. Oracle 12 Syntax: SELECT column_name(s) FROM table_name.
4. Older Oracle Syntax: SELECT column_name(s)
5. Older Oracle Syntax (with ORDER BY): SELECT *

What is optimization in Db2?

Optimizing access plans is one of the best ways to ensure that the query compiler behaves the way you expect and design it to. Statistical views. The Db2 cost-based optimizer uses an estimate of the number of rows processed by an access plan operator to accurately cost that operator.

How do I find Top 5 records in SQL?

How can I get top 3 salary in SQL?

1. TOP keyword SELECT TOP 1 salary FROM (SELECT TOP 3 salary FROM Table_Name ORDER BY salary DESC) AS Comp ORDER BY salary ASC.
2. limit SELECT salary FROM Table_Name ORDER BY salary DESC LIMIT 2, 1.
3. by subquery. SELECT salary FROM (SELECT salary FROM Table_Name ORDER BY salary DESC LIMIT 3) AS Comp ORDER BY salary LIMIT 1;

What Sqlcode 805?

Explanation. An application program attempted to use a package that was not found.

How do I SELECT a specific row number in SQL?

To select rows using selection symbols for character or graphic data, use the LIKE keyword in a WHERE clause, and the underscore and percent sign as selection symbols. You can create multiple row conditions, and use the AND, OR, or IN keywords to connect the conditions.

How do I SELECT two tables in SQL?

To do so, we need to use join query to get data from multiple tables.
…
Example syntax to select from multiple tables:

1. SELECT p. p_id, p. cus_id, p. p_name, c1. name1, c2. name2.
2. FROM product AS p.
3. LEFT JOIN customer1 AS c1.
4. ON p. cus_id=c1. cus_id.
5. LEFT JOIN customer2 AS c2.
6. ON p. cus_id = c2. cus_id.

How do I join 3 tables in SQL Db2?

When you want to see information from multiple tables, you can use a SELECT statement. SELECT statements can retrieve and join column values from two or more tables into a single row. The retrieval is based on a specified condition, typically of matching column values.

What is maximum size of table space in DB2?

Table space capacity for large and temporary table spaces has increased. In Version 9.7, the maximum size of large and temporary table spaces has been raised to 64 TB.

How do I write a select query in DB2?

Here is the simplest form of the SELECT statement:

1. SELECT select_list FROM table_name;
2. SELECT title FROM books;
3. SELECT title, isbn FROM books;
4. SELECT book_id, title, total_pages, rating, isbn, published_date, publisher_id FROM books;
5. SELECT * FROM books;
6. SELECT expression FROM sysibm.sysdummy1;

Can cursor fetch multiple rows?

The multiple-row FETCH statement can be used with both serial and scrollable cursors. The operations used to define, open, and close a cursor for a multiple-row FETCH remain the same. Only the FETCH statement changes to specify the number of rows to retrieve and the storage where the rows are placed.

What is Rowset in Db2?

A rowset-positioned cursor is a cursor that can return one or more rows for a single fetch operation. The cursor is positioned on the set of rows that are to be fetched.