java - How can i search for the year in a date via a query?

Question

The records in the db look like this:

10//12/2013
10/13/2013
10/16/2013
10/20/2013

I want to search 2013 in the above records. Do i have to split first above values?

from CustomerRelations where DATE like'" + input + "'

Can I use like here?

Or how else can I do this?

   Query q = session.createQuery("from CustomerPayment where DATE like '" + code + "'");

The Above code does not work.

score 2 · Accepted Answer

由于您已将日期保存为 VARCHAR 进行通配符字符串匹配

Query q = session.createQuery("from CustomerPayment where DATE like '%" + code + "'");

LIKE 子句允许您使用两个通配符：

理想情况下，您应该使用 TIMESTAMP 列创建表。这将允许您准确比较日期并构建查询，例如“获取过去三个月内的所有客户付款”等。

score 1 · Accepted Answer

您可以使用

datepart(year,datefield)

其中 datefield 是您要从中检索年份的字段

Query q = session.createQuery("SELECT date FROM CustomerPayment WHERE datepart(year,"+Convert.ToDateTime(datefield)+")="+ input+";

score 0 · Accepted Answer

尝试将您的查询更改为

Query q = session.createQuery("SELECT date FROM CustomerPayment WHERE date LIKE '%"+input+"'"

由于您的日期字段是一个字符串，您必须通过字符串比较进行查找

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