How to calculate the day of the week?Slowtiger published on 2009-11-19 08:42:00How to calculate the day of the week?--Caille (Zeller) formulaWhat is the day of the week in history? What day of the future is the week? With regard to this problem,
How do I calculate the day of the week? --Caille (Zeller) formulaWhat is the day of the week in history? What day of the week is the future? There are a number of computational formulae (two general calculation formulae and some piecewise
All along, the most used is my97datepicker to get the month and day method, today suddenly wandered to this article, stay, for future use
Write one yourself: Get the year and start counting from next month
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Date and Time functionsThis chapter discusses some functions that can be used to manipulate time values. See section 11.3, "Date and Time type" for valid formats for each time and date type with a range and a specified value.
The following example
Here is an example of using a date function. The following query selects records for all Date_col values within the last 30 days.Mysql> SELECT something from Tbl_nameWHERE To_days (now ()) –to_days (date_col) DAYOFWEEK (date)Returns the week index
Mysql> SELECT something from Tbl_name
WHERE To_days (now ()) –to_days (date_col)
DayOfWeek (date)
Returns the week index of date (1 = Sunday, 2 = Monday, ...). 7 = Saturday). Index values are compliant with ODBC standards.
mysql> SELECT DayOfWeek ('
The following query selects the records for all date_col values within the last 30 days.
Mysql> SELECT something from Tbl_name
WHERE To_days (now ())-To_days (Date_col) DayOfWeek (date)
Returns the week index of date (1 = Sunday, 2 = Monday, ...). 7
Here is an example of using the date function. The following query Selects all records whose date_col values are within the last 30 days.
Here is an example of using the date function. The following query Selects all records whose date_col values
The following query Selects all records whose date_col values are within the last 30 days.
Mysql> SELECT something FROM tbl_nameWHERE TO_DAYS (NOW ()-TO_DAYS (date_col) DAYOFWEEK (date)Returns the week index of date (1 = Sunday, 2 = Monday,... 7 =
How to Use substring in oracle Database CONVERT (varchar (12), getdate (), 112), substringgetdate
SqlserverI often need to perform some time-type field conversions, but I don't quite remember it. So I collected the following
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