Question

我想获得SQL中的行数。我用

select ROWNUM,FULL_NAME
from OSQS_INSTITUTION
order by FULL_NAME
WHERE rownum BETWEEN 10 AND 20

并试试这个

select ROWNUM,FULL_NAME
from OSQS_INSTITUTION
order by FULL_NAME limit 10,20

并且都返回相同的错误

SQL命令未正确结束

修改

    StringBuilder sqlStatement = new StringBuilder();
    sqlStatement.append("SELECT USER_NO,FULL_NAME,ACTIVE from");
    sqlStatement.append("(");
    sqlStatement.append(" SELECT USER_NO,FULL_NAME,ACTIVE, ROW_NUMBER() OVER(ORDER BY full_name) rn");
    sqlStatement.append("FROM osqs_institution");
    sqlStatement.append(")WHERE rn BETWEEN ? AND ? ");

    PreparedStatement pstmt = null;
    pstmt = con.prepareStatement(sqlStatement.toString());
    pstmt.setInt(1, from);
    pstmt.setInt(2, to);
    rs = pstmt.executeQuery();

带有必要的尝试和捕获。

Answer 1

在查询的第一个版本中，您在WHERE之后指定了ORDER BY子句，这在语法上是错误的。

第二个版本适用于MySQL，但不适用于Oracle。

在任何一种情况下，当您将其与BETWEEN一起使用时，您将无法获得任何行。

而是试试这个：

WITH qry AS
(
    SELECT full_name, ROW_NUMBER() OVER(ORDER BY full_name) rn
        FROM osqs_institution
)
SELECT rn, full_name
  FROM qry
WHERE rn BETWEEN 10 AND 20

如果您不想使用ROW_NUMBER函数，请尝试以下操作：

SELECT rn, full_name
  FROM
(
    SELECT full_name, ROWNUM AS rn 
        FROM (SELECT * FROM osqs_institution ORDER BY full_name)
)
WHERE  rn BETWEEN 10 AND 20

在Oracle 11g中获取指定的行数

1 个答案: