• ## The first anniversary of the graduation of Apache dolphin scheduler ASF incubator, here comes the report!

Time：2022-6-3

Unconsciously, Apache dolphin scheduler has graduated from the Apache Software Foundation (hereinafter referred to as ASF) incubator for one year! On April 9, 2021 Beijing time, ASF officially announced that Apache dolphin scheduler had graduated as Apache’s top-level project, bringing the first top-level project led by Chinese people and contributed to Apache’s big data workflow […]

• ## Time period division

Time：2022-5-22

I’ve looked for many functions to divide a time period on the Internet, but I don’t think they are particularly complete or easy to use. I just wrote one according to the online information.   The time period can be divided according to week, month, quarter and year (it is strictly divided according to the […]

• ## Report: in the third quarter of 2020, the profit of defi market was 108 million US dollars!

Time：2022-3-15

After the outbreak of liquidity mining has brought a lot of air coins, the market has entered a calm stage. The next projects worthy of attention need to be paid attention toReturn to profit as support, you need to provide real value for the token itself, and then usePE、PSIndicators to evaluate the agreement token will […]

• ## Time series prediction in Statistical Science (Part 2)

Time：2021-12-6

The first two articles introduce several direct prediction methods for time series. This one tells you how to decompose time series and predict data according to the decomposition method. To predict an index, we must first know what factors affect the index. If the leader asked you to estimate the sales volume of next month, […]

• ## [pl / SQL] conversion function (date / string / number)

Time：2021-9-15

After reading this chapter, you will learn the following What kinds of conversion functions are there? Which one is usually used most? Why use conversion functions? What are the applicable conditions for their respective conversion relationships? There are three types of data: number, character and dateCorresponding to the three types of functions used to convert […]

• ## JS time format and time stamp conversion function

Time：2020-12-8

JS time format and time stamp conversion function //Format time function dateFormat(fmt,date){ var o = { “M+” : date.getMonth () + 1, // month “d+” : date.getDate (), // day “h+” : date.getHours (), // hours “m+” : date.getMinutes (), // min “s+” : date.getSeconds (), // sec “q+” : Math.floor (( date.getMonth () + […]

• ## Some common query SQL statements and display formats

Time：2020-9-25

1. Query the related time of current year, month and week 1.1. Query current year SELECT TO_CHAR(SYSDATE,’YYYY’) AS YEAR FROM DUAL SELECT TO_CHAR(SYSDATE,’YYY’) AS YEAR FROM DUAL SELECT TO_CHAR(SYSDATE,’YY’) AS YEAR FROM DUAL SELECT TO_CHAR(SYSDATE,’Y’) AS YEAR FROM DUAL 1.2. Query the day of the current year SELECT TO_CHAR(SYSDATE,’DDD’) AS DAYS FROM DUAL 1.3. Query […]

• ## [SQL common functions] the second set of conversion functions

Time：2020-9-1

After reading this chapter, you will learn the following What are the conversion functions? Which one is usually used most? Why use conversion functions? What are the applicable conditions for their respective transformation? * There are three types of data: number, character and dateCorresponding to the conversion of their three types of functions: conversion function! […]

• ## MySQL calculates the days, months and years of the difference between two dates

Time：2019-12-25

The date function timestampdiff provided with MySQL calculates the number of seconds, minutes, hours, days, weeks, quarters, months, and years between the two dates. The current date increases or decreases by one day, one week, and so on. Select timestampdiff (type, start time, end time) Seconds difference: SELECT TIMESTAMPDIFF(SECOND,’1993-03-23 00:00:00′,DATE_FORMAT(NOW(), ‘%Y-%m-%d %H:%i:%S’)) Minutes difference: SELECT […]

• ## Oracle’s query sorting method by day, week, month, quarter and year

Time：2019-12-8

Oracle queries by day, week, month, quarter and year Day — to_char (t.start_time, ‘yyyy-mm-dd’) Week — to char (t.start time, ‘yyyy’), to char (t.start time, ‘IW’) Monthly -‘to’char (t.start’time, ‘yyyy-mm’) Quarter — to char (t.start’time, ‘yyyy’), to char (t.start’time, ‘Q’) Year -‘to’char (t.start’time, ‘yyyy’) Query by day select to_char(t.start_time,’YYYY-MM-DD’) day ,count(*) from test t Where […]

• ## PHP access today, yesterday, this week, last week, this month, last month, this season, last season, this year, last year

Time：2019-9-15

// Starting today\$beginToday = date(‘Y-m-d 00:00:00’, time());// It’s over today.\$endToday = date(‘Y-m-d 23:59:59’, time()); // It started yesterday.\$beginYesterday = date(‘Y-m-d 00:00:00’, strtotime(‘ -1 day’));// It ended yesterday.\$endYesterday = date(‘Y-m-d 23:59:59’, strtotime(‘ -1 day’)); // This week begins, Monday begins.\$beginThisWeek = date(‘Y-m-d 00:00:00’, strtotime(‘this week monday’));// This week ends, Sunday ends.\$endThisWeek = date(‘Y-m-d 23:59:59’, strtotime(‘this week […]

• ## JavaScript specified date formatting

Time：2019-7-29

formatDataToString:function (dates, formats) { var o = { “M+”: dates. getMonth () + 1, // month “D+”: dates. getDate (), //day “H+”: dates. getHours (), // hour “M+”: dates. getMinutes (), // points “S+”: dates. getSeconds (), // seconds “Q+”: Math. floor ((dates. getMonth () + 3) / 3), // Quarterly “S”: dates. getMilliseconds () […]