Question

我正在尝试在我的Java程序中编写一个查询来选择两个日期之间的记录。我已经建立了我的日期：

SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yy", Locale.ENGLISH);
Date parsed;
try 
{
    parsed = formatter.parse(sqlDateIn);
    java.sql.Date sqlDate = new java.sql.Date(parsed.getTime());
    returnDate = sqlDate;
}

当我查询数据库时，我得到附件。

我无法通过查询来选择任何记录（例如，在01/01/15和12/31/15之间）。我尝试了各种strftime的组合，但无济于事。

我是Java和SQLite的菜鸟，所以我确信这是一个愚蠢的用户错误。

Image of database table

对不起我在下面的回复。

SELECT Course, date  DateSort FROM Peter_SCORE_TBL WHERE DateSort BETWEEN '01/01/15' AND '12/31/15'

SELECT Course, date  DateSort FROM Peter_SCORE_TBL WHERE DateSort BETWEEN '2015/01/01' AND '2015/12/31' 

SELECT Course, date  DateSort FROM Peter_SCORE_TBL WHERE DateSort BETWEEN '2015-01-01' AND '2015-12-31' 

SELECT Course, date  DateSort FROM Peter_SCORE_TBL strftime('%m/%d/%Y', DateSort) BETWEEN '01/01/15' AND '12/31/15'

以上是我在Firefox SQLite Manager扩展程序中尝试的内容。

编辑：在上面，我将DateSort定义为DATETIME。我已更改为DATE和VARCHAR并运行上述查询，未选择任何内容。

我也尝试过：

SELECT * FROM Peter_SCORE_TBL WHERE date(DateSort) BETWEEN date('01/01/15') AND date('12/31/15')

SELECT * FROM Peter_SCORE_TBL WHERE date(DateSort) BETWEEN date('2015-01-01') AND date('2015-12-31')

都没有奏效。不知道还有什么可以尝试。

编辑：

我抓住了这一小段代码并对其进行了修改以进行测试。这是行不通的。我错过了什么？

public class SQLiteTest 
{
        public static void main(String[] args) throws Exception 
        {
            Class.forName("org.sqlite.JDBC");
            Connection conn = DriverManager.getConnection("jdbc:sqlite:/Users/peterream/Desktop/Desktop Archive/Crashplan/sqlitetest.sqlite");
            Statement stat = conn.createStatement();
            stat.executeUpdate("drop table if exists people;");
            stat.executeUpdate("create table people (name TEXT, occupation TEXT, DateSort INTEGER);");
            PreparedStatement prep = conn.prepareStatement(
                "insert into people values (?, ?, ?);");

            prep.setString(1, "Gandhi");
            prep.setString(2, "politics");
            prep.setDate(3, convertSQLDate("2016-04-08"));
            prep.addBatch();
            prep.setString(1, "Turing");
            prep.setString(2, "computers");
            prep.setDate(3, convertSQLDate("2015-04-08"));
            prep.addBatch();
            prep.setString(1, "Wittgenstein");
            prep.setString(2, "smartypants");
            prep.setDate(3, convertSQLDate("2014-04-08"));
            prep.addBatch();

            conn.setAutoCommit(false);
            prep.executeBatch();
            conn.setAutoCommit(true);

            ResultSet rs = stat.executeQuery("select * from people WHERE strftime('%Y-%m-%d', DateSort) BETWEEN '2015-01-01' AND '2015-12-31';");
            while (rs.next()) {
                System.out.println("name = " + rs.getString("name"));
                System.out.println("job = " + rs.getString("occupation"));
                System.out.println("DateSort = " + rs.getString("DateSort"));
            }
            rs.close();
            conn.close();
        }
/**
**
* This method converts input string date to sql date format
* 
* @param  String sqlDateIn (MM/dd/yy)
* @return java.sql.Date returnDate
*/

        public static java.sql.Date convertSQLDate (String sqlDateIn)
        {
            java.sql.Date returnDate = null;

            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
            java.util.Date parsed;
            try 
            {
                parsed = formatter.parse(sqlDateIn);
                java.sql.Date sqlDate = new java.sql.Date(parsed.getTime());
                returnDate = sqlDate;
            }
            catch (ParseException e) 
            {
                e.printStackTrace();
            }
            return returnDate;
        }
}

我希望选择1行2015-04-08。

在日期之间选择SQLite

0 个答案: