SQL 在两个日期语句之间使用 java 字符串

Question

我正在尝试从 table 和运行两个日期之间的语句中收集数据。该语句在 java 字符串中创建，然后由结果集变量使用 statement.executeQuery() 并以该字符串作为参数。这就是我为两个日期创建字符串的方式：

Calendar today = Calendar.getInstance();
        int month = today.get(Calendar.MONTH);
        int year = today.get(Calendar.YEAR);
        int endOfMonth = today.getActualMaximum(Calendar.DATE);
        String sql;
        if (month < 10) {
            sql = "SELECT * FROM ORDERS WHERE DATE BETWEEN " + "#0" + month + "/01/" + year + "#" + " AND " + "#0" + month + "/" + endOfMonth + "/" + year + "#";

当我打印这个字符串时，结果是这样的：

SELECT * FROM ORDERS WHERE DATE BETWEEN #03/01/2015# AND #03/30/2015#

但是，当我运行这个字符串通过executeQuery方法出现这个错误：

java.sql.SQLSyntaxErrorException: Lexical error at line 1, column 41.  Encountered: "#" (35), after : "".

Answer 1

在 SQL 中，日期需要包含在引号内 ' 而不是主题标签 #.

一旦你改变了它们，这个查询应该可以工作。

SELECT * FROM ORDERS WHERE DATE BETWEEN '03/01/2015' AND '03/30/2015'

而不是

SELECT * FROM ORDERS WHERE DATE BETWEEN #03/01/2015# AND #03/30/2015#

Answer 2

试试这个：

  Calendar cal= Calendar.getInstance(); //Get the current date
  SimpleDateFormat formatter= new SimpleDateFormat("yyyy/MMM/dd"); //format it as per your requirement
  String today = formatter.format(cal.getTime());
  String lastday = formatter.format(cal.getActualMaximum(Calendar.DATE));

  String sql;
  sql = "SELECT * FROM ORDERS WHERE DATE BETWEEN " + CONVERT(Char(10), today,112) + " AND " + CONVERT(Char(10), lastday ,112)

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