例如,在以下示例中,将TO_DATE 函数的第二个参数设置为 CAST表达式: select (to_date(’10-12 23:56:33’, cast(’mm-ddhh12:mi:ss’as char(30))) ; 返回结果如下: 2017-10-12 23:56:33.000000 如果source_char参数(源字符串)与 fmt 参数(格式化串)之间存在连接字符省略的情况,则当源字符串和格式...
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在Presto SQL引擎中,可以使用to_date函数将字符串转换为日期。to_date函数的语法如下: 代码语言:txt 复制 to_date(string, format) 其中,string是要转换的字符串,format是表示日期格式的字符串。 下面是一个示例,演示如何使用to_date函数将字符串转换为日期: 代码语言:txt 复制 SELECT to_date('2022-01...
mysql>setsql_dialect=presto;QueryOK,0rowsaffected(0.00sec)mysql>SELECTcast(start_timeasvarchar(20))ascol1,array_distinct(arr_int)ascol2,FILTER(arr_str,x->xLIKE'%World%')ascol3,to_date(value,'%Y-%m-%d')ascol4,YEAR(start_time)ascol5,date_add('month',1,start_time)ascol6,REGEXP_EXTRACT...
toDate(value)ascol4, toYear(start_time)ascol5, addMonths(start_time,1)ascol6, extractAll(value,'-.')ascol7, JSONExtractString('{"id": "33"}','id')ascol8, arrayElement(arr_int,1)ascol9, date_trunc('day',start_time)ascol10FROMtest_sqlconvertwheredate_trunc('day',start_time)='2024...
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Returns the bin number of x according to the bins specified by the array bins,使用如下:presto:default> select width_bucket(6,array[1,2,3]) as width; width --- 3三角函数 acos(x) 返回x 的反余弦值,使用如下:presto:default> select acos(0.5) as inversecosine; inversecosine --- ...
date functions date_format(VARCHAR, VARCHAR) -> VARCHAR: get the date format string to_date(VARCHAR) -> VARCHAR: get the date part of the date string get_date(BIGINT) -> VARCHAR: get the date compared with today. get_date(-1) or get(1) ...