Select CONVERT(varchar(100), GETDATE(), 1): 05/16/06 Select CONVERT(varchar(100), GETDATE(), 2): 06.05.16 Select CONVERT(varchar(100), GETDATE(), 3): 16/05/06 Select CONVERT(varchar(100), GETDATE(), 4): 16.05.06
date 把字串转换成日期 to_date('05 Dec 2000', 'DD Mon YYYY')to_timestamp(text, text)timestamp 把字串转换成时间戳 to_timestamp('05 Dec 2000', 'DD Mon YYYY')to_timestamp(double)timestamp 把UNIX纪元转换成时间戳 to_timestamp(200120400)to_number(text, text)numeric 把字串转换成numeric ...
CONVERT_TZ()将当前时区更改为另一时区 CURDATE()返回当前日期 CURRENT_DATE(), CURRENT_DATECURDATE() 的别名 CURRENT_TIME(), CURRENT_TIMECURTIME() 的别名 CURRENT_TIMESTAMP(), CURRENT_TIMESTAMPNOW() 的别名 CURTIME()返回当前时间 DATE_ADD()将两个日期相加 DATE_FORMAT()按照指定格式格式化日期 DATE_SU...
convert('PostgreSQL' using iso_8859_1_to_utf8) 22、9;PostgreSQL'lower(string)text把字串转化为小写lower('TOM')tomoctet_length(string)int字串中的字节数octet_length('jose')4overlay(string placing string from int for int)text替换子字串overlay('Txxxxas' placing 'hom' from 2 for 4)Thomas...
TO_CHAR() function, TO_TIMESTAMP() function, DATE_PART() function, etc. TheTO_TIMESTAMP()is a must-have function for anyone working with PostgreSQL. It is a built-in formatting function that allows us to easily convert a string representation of a date-time into a timestamp data type....
PostgreSQL allows us to convert a date, interval, number, timestamp, etc., to a string via theTO_CHAR()function. The TO_CHAR() function utilizes a format mask to convert the input value to a string. The format mask must be a valid number or date. ...
mysql:mysql中时间相关的类型有日期date、时间time以及datetime、timestamp和year类型。 pg:pg中的时间数据类型基本和mysql一致。区别在于pg中支持timez类型,即带时区的时间类型,这个mysql中不支持,但是pg中不支持mysql中的year类型,不过我们仍然可以通过创建domain的方式来在pg中实现year类型。
convert(string using conversion_name) text 使用指定的转换名字改变编码。 convert('PostgreSQL' using iso_8859_1_to_utf8) 'PostgreSQL' lower(string) text 把字串转化为小写 lower('TOM') tom octet_length(string) int 字串中的字节数 octet_length('jose') 4 overlay(string placing string from int ...
SELECT $__timeGroup("time_date_time",'5m'), min("value_double"), 'min' as metric FROM test_data WHERE $__timeFilter("time_date_time") GROUP BY time ORDER BY time The folowing code example shows using the fill parameter in the $__timeGroup macro to convert null values to be ze...
Money Decimal String Char String String Varchar String String Text String String Bytea Byte[] Byte[] Timestamp DateTime DateTime Timestamp with time zone DateTime String Date DateTime DateTime Time TimeSpan TimeSpan Time with time zone DateTimeOffset String Interval TimeSpan String Boolean Boolean Bool...