select current_timestamp() from BssProduct 2、 利用Hibernate的formula表达式来做影射 例如在BssProduct.hbm.xml中通过formula 的表达式来影射字段 <property name=”mydate” type=”java.utl.date” formula=”( select now() from bss_product bs ) ” /> 注意:使用formula时候sql语句中的table名称及字段名...
hibernate也提供了一个函数current_timestamp(说起timestamp,个人认为数据库的timestamp做的很差,它居然和datetime是一个数量级的(精确度),这怎么可以用来表示真正的stamp啊!)。可是,你却无法用直接使用“select current_timestamp()”来获得服务器的当前时间,你还必须加上一个查询的表!比如,“select curre...
current_date(): 返回当前日期。 示例:SELECT e FROM Employee e WHERE e.joinDate = current_date() current_time(): 返回当前时间。 示例:SELECT e FROM Employee e WHERE e.joinTime = current_time() current_timestamp(): 返回当前日期和时间。 示例:SELECT e FROM Employee e WHERE e.joinDateTime ...
select count(payment), status.name from Payment as payment join payment.currentStatus as status join payment.statusChanges as statusChangewhere payment.status.name <> PaymentStatus.AWAITING_APPROVAL or ( statusChange.timeStamp = ( select max(change.timeStamp) from PaymentStatusChange change where cha...
● 时间操作函数current_date()、current_time()、current_timestamp()、second()、minute()、hour()、day()、month()、year()等。 ● HQL还支持EJB-QL 3.0所支持的函数或操作substring()、trim()、lower()、upper()、length()、locate()、abs()、sqrt()、bit_length()、coalesce()和nullif()等。
current_time() current_date() current_timestamp() length() upper() lower() trim() 7.更新 String hql="update Product set name='雨伞' where id=4"; Query query=session.createQuery(hql); query.executeUpdate(); 8.内连接 String hql="select p from Product p [inner] join p.category"; ...
public boolean supportsCurrentTimestampSelection() { return true; } @Override public boolean isCurrentTimestampSelectStringCallable() { return false; } @Override public String getCurrentTimestampSelectString() { return "select current_timestamp"; ...
createtablestudentTimestamp(idvarchar(32),namevarchar(32),lastUpdateDateTimetimestamp notnulldefaultcurrent_timestamponupdatecurrent_timestamp); pojos: packageTimestamp; importjava.util.Date; publicclassStudent { privateString id; privateString name; ...
Generate the appropriate select statement to to retrieve the next value of a sequence. ViolatedConstraintNameExtractergetViolatedConstraintNameExtracter() booleanisCurrentTimestampSelectStringCallable() Should the value returned byDialect.getCurrentTimestampSelectString()be treated as callable. ...
select max(change.timeStamp) from PaymentStatusChange change where change.payment = payment ) and statusChange.user <> :currentUser ) group by status.name, status.sortOrder order by status.sortOrder 假若我已经把statusChange集合映射为一个列表而不是一个集合的话,查询写起来会简单很多。