You can use the date and time functions to query an SQL database for records related to a specific date and time. For example, you can use the CURDATE() function in MySQL to get data with a date field value equal to the current date. Querying data from past or future date In additio...
返回包含当前的时区信息的TIMESTAMP WITH TIME ZONE数据类型。 示例 设置当前会话时区至 GMT-5 时区,返回当前会话的时间及会话时区信息,且调整秒的小数位精度为2。 obclient>ALTERSESSIONSETTIME_ZONE='-05:00';Query OK,0rowsaffected obclient>SELECTCURRENT_TIMESTAMP(2)FROMDUAL;+---+|CURRENT_TIMESTAMP(2)...
SQL Reference Documentation AWS Kinesis Data Analytics SQL Reference PDF Fokusmodus Diese Seite wurde nicht in Ihre Sprache übersetzt.Übersetzung anfragen Returns the current Amazon Kinesis Data Analytics system time when the query executes. Time is in UTC, not the local time zone. ...
<8> reverse(): 对查询结果反向排序,请注意reverse()通常只能在具有已定义顺序的QuerySet上调用(在model类的Meta中指定ordering或调用order_by()方法)。 <9> distinct(): 从返回结果中剔除重复纪录(如果你查询跨越多个表,可能在计算QuerySet时得到重复的结果。此时可以使用distinct(),注意只有在PostgreSQL中支持按字...
that is in the trigger.*/SELECTIDENT_CURRENT('t6');/* Returns value inserted into t6. This was the INSERT statement four statements before this query.*/-- Do the following in Session 2.SELECT@@IDENTITY;/* Returns NULL because there has been no INSERT action up to this point in this ...
NoSQL 复制 SELECT VALUE { currentTimestamp: GetCurrentTimestamp() } JSON 复制 [ { "currentTimestamp": 1556916469065 } ] 注解 此函数为非确定性函数。 返回的结果采用 UTC(协调世界时)格式。 此函数不使用索引。 如果需要将值与当前时间进行比较,请在执行查询之前获取当前时间,并在 WHERE 子句中使...
that is in the trigger.*/SELECTIDENT_CURRENT('t6');/* Returns value inserted into t6. This was the INSERT statement four statements before this query.*/-- Do the following in Session 2.SELECT@@IDENTITY;/* Returns NULL because there has been no INSERT action up to this point in this ...
Recently we moved our application db connection pool library from C3PO to Hikari cp. I am facing SQLTimeoutException and QueryTimeoutException exceptions intermittently. Library Version HikariCP-3.3.1 Spring boot: 1.2.5.RELEASE spring ba...
SELECT /*+ read_consistency(weak) ob_querytimeout(100000000) */ substr(usec_to_time(request_time),1,19) request_time_, s.svr_ip, s.client_Ip, s.sid,s.tenant_id, s.tenant_name, s.user_name, s.db_name, s.query_sql, s.affected_rows, s.return_rows, s.ret_code, s.event, ...
具体问题描述为,[读取数据库数据失败. 请检查您的配置的 column/table/where/querySql或者向 DBA 寻求帮助.]. - 执行的SQL为: select * from emp where FROM_UNIXTIME(operationDate) >= FROM_UNIXTIME(${lastTime}) and operationDate < FROM_UNIXTIME(${currentTime}) 具体错误信息为:com.mysql.jdbc....