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[英]ERROR: function date_trunc(timestamp without time zone) does not exist
[英]SQL: function trunc(timestamp without time zone, "unknown") does not exist
我正在尝试使用以下代码将日期列转换为周:
select trunc(join_date, 'D') as join_wk from my_table
但我收到以下错误:
function trunc(timestamp without time zone, "unknown") does not exist
Hint: No function matches the given name and argument types. You may need to add explicit type casts.
其中join_date
的格式为:
2017-08-24 14:49:59
我在查询中做错了什么? 谢谢!
该函数的名称是date_trunk
,您必须交换参数:
SELECT DATE_TRUNC('D', join_date) AS join_wk FROM my_table
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