milliseconds second minute hour day week month quarter year decade century millennium 创建日期/时间 make_date(year int, month int, day int) 函数用于创建一个日期: SELECT make_date(2020, 03, 15); make_date | ---| 2020-03-15| make_interval(years int DEFAULT 0, months int DEFAULT 0, ...
MILLISECONDS 秒域,包括小数部分,乘以 1000。 EXTRACT(MILLISECONDS from TIME '17:12:28.5'); 28500 MINUTE 分钟域(0-59) EXTRACT(MINUTE from TIMESTAMP '2001-02-16 20:38:40'); 38 MONTH 对于timestamp数值,它是一年里的月份数(1-12);对于interval数值,它是月的数目,然后对12取模(0-11) EXTRACT(MON...
如果表中已经存储了timestamp类型的时间数据,并且需要检索这些时间的毫秒表示,可以使用类似的查询。例如: sql SELECT floor(extract(epoch from your_timestamp_column) * 1000) AS timestamp_in_milliseconds FROM your_table; 要格式化时间戳,可以使用to_char函数。例如,将时间戳格式化为包含毫秒的字符串: sql SE...
缺省的时候在精度上是没有明确的绑定的, p 有用的范围对 timestamp和 interval 是从 0 到大约 6 2、对于date和timestamp 数值而言, 是自1970-01-01 00:00:00以来的秒数(结果可能是负数);对于interval数值而言,它是时间间隔的总秒数。 二、当前时间: test=# select now(),current_timestamp,current_date...
# %n = timestamp with milliseconds (as a Unix epoch) # %Q = query ID (0 if none or not computed) # %i = command tag # %e = SQL state # %c = session ID # %l = session line number # %s = session start timestamp # %v = virtual transaction ID ...
Milliseconds or microseconds are treated as seconds While converting a string to a timestamp, theTO_TIMESTAMP()function treats the milliseconds or microseconds as seconds after the decimal point. For example: SELECT TO_TIMESTAMP('21-09-2022 12:2', 'DD-MM-YYYY SS:MS'); ...
#%n=timestampwithmilliseconds(asa Unix epoch)#%Q=queryID(0ifnone or not computed)#%i=command tag #%e=SQLstate #%c=sessionID#%l=session line number #%s=session start timestamp 代码语言:javascript 代码运行次数:0 运行 AI代码解释 2024-11-2821:34:16.906EST[2139][[unknown]]localhostlocalhost...
milliseconds = 5000 # 在报告认证失败之前等待的毫秒数,默认值为0 # auto_explain 模块,可以定义sql执行的时间以记录在postgres的日志中,包含sql的直接计划。 auto_explain.log_min_duration = 1s # 记录执行超过1s的sql auto_explain.log_analyze = true # 执行statement, 得到真实的运行时间以及统计信息 auto_...
在PostgreSQL中使用timestamp数据类型 To get three milliseconds, one must write12.003, which the conversion treats as 12 + 0.003 = 12.003 seconds. 第一点:众所周知,timestamp数据类型最细粒度到微秒(us),也就是timestamp(6) 那么 postgres=# create table abc_s.test_lei (c1 timestamp(7));...
The output shows that the TO_TIMESTAMP function specified the milliseconds in the seconds' field after the decimal part. Example 4: ERROR: Invalid Value Passing an invalid format to a TO_TIMESTAMP() function will result in an “Invalid Value” error: ...