SELECT ROW_NUMBER() OVER ( ORDER BY ( SELECT NULL ) ) AS RNK FROM L5 ORDER BY RNK OFFSET(@BEGINNUM - 1) ROWS FETCH FIRST(@ENDNUM - @BEGINNUM) + 1 ROWS ONLY; GO 在以上两段 SQL 中,我们都使用了 SQL Server 2012 以来的新语法糖, offset ... fetch first rows only 来分页 2. 给...
在db2中如果想获取前n行,只要加上fetch first n rows only 就可以了,但在oracle中没有fetch,网上很多人说可以用oracle的rownum<=n来替代db2的fetch first n rows only,但这样的替换,在对结果集需要进行order by之后再获取前n行时,是不对的。根据我的试验,rownum的顺序好像是和rowid相对应的,而rowid的顺序是...
SQL> SELECT SUBSTR(name,1,1), COUNT(*) 2 FROM countries 3 GROUP BY SUBSTR(name,1,1) 4 ORDER BY COUNT(*) DESC 5* FETCH FIRST 3 ROWS ONLY; SUBSTR(NAME,1,1) COUNT(*)___ ___S 26M 18B 17 此时，WITH TIES 关键字派上用场，因为它将在结果中包含平局：...
FETCHFIRSTnumberROWS ONLY; Older Oracle Syntax: SELECTcolumn_name(s) FROMtable_name WHEREROWNUM <=number; Older Oracle Syntax (with ORDER BY): SELECT* FROM(SELECTcolumn_name(s)FROMtable_nameORDERBYcolumn_name(s)) WHEREROWNUM <=number; ...
1. 2. 3. 4. 上述示例中,我们查询了名为table_name的表中的所有数据,并按column1列进行排序。然后,我们使用OFFSET和FETCH语句指定了只返回从第0行开始的10行数据。 总结 本文介绍了在SQL Server中查询指定行数的几种方法,包括使用TOP关键字、FETCH FIRST…ROWS ONLY语句、ROW_NUMBER()函数和OFFSET…FETCH语句...
1. ORACLE SELECT * FROM TABLE1 WHERE ROWNUM<=N 2. INFORMIX SELECT FIRST N * FROM TABLE1 3. DB2 5 SELECT * ROW_NUMBER() OVER(ORDER BY COL1 DESC) AS ROWNUM WHERE ROWNUM<=N DB2 SELECT COLUMN FROM TABLE FETCH FIRST N ROWS ONLY ...
ONLY:是FETCH语句的必要部分,用于指明仅取FETCH行数。 2. 基本用法示例 以下是一些使用OFFSET和FETCH的基本示例,帮助理解其用法。 2.1 简单分页查询 假设有一个Employees表,我们希望分页获取数据,每页显示 10 条记录。可以使用OFFSET和FETCH来实现: SELECTEmployeeID, FirstName, LastNameFROMEmployeesORDERBYEmployeeIDOF...
the SQL_ATTR_ROW_ARRAY_SIZE is greater than 1),SQLGetData()can be called only if SQL_GD_BLOCK is returned whenSQLGetInfo()is called with anInfoTypeof SQL_GETDATA_EXTENSIONS. (Not all DB2® data sources support SQL_GD_BLOCK.) Data in unbound columns is discarded whenSQLFetch()advances...
SQL_ATTR_CURSOR_SCROLLABLE語句屬性的值是SQL_NONSCROLLABLE,而且自變數 FetchOrientation 的值並未SQL_FETCH_NEXT。 HY107超出範圍的數據列值使用 SQL_ATTR_CURSOR_TYPE 語句屬性指定的值是SQL_CURSOR_KEYSET_DRIVEN,但以 SQL_ATTR_KEYSET_SIZE 語句屬性指定的值大於 0,而且小於使用 SQL_ATTR_ROW_ARRAY_SIZE 語...
*/ ROLLBACK TRANSACTION OutOfProc; GO EXECUTE TransProc 3,'bbb'; GO /* The following SELECT statement shows only rows 3 and 4 are still in the table. This indicates that the commit of the inner transaction from the first EXECUTE statement of TransProc was overridden by ...