interval 1

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 =

Mysql database reads the statements from the front, back, back, to the back Current Time: select current_timestamp; Output: 16:12:52 select now(); Output: 16:12:52 Take the first minute of the current time: select SUBDATE(now(),interval 60 second);

Vi. Pattern Matching: PostgreSQL provides three ways to implement pattern matching: SQL Like operator, more recent similar to operator, and posix-style regular expression.1. Like: Copy Code code as follows: string like pattern

In MySQL database, you often encounter the content of the day of statistics.For example, in the user table, the Date field is: Log_timeStatistics DayThe SQL statement is:SELECT * from user where date (log_time) = Curdate ();Curdate () indicates the

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

The MySQL time plus function defines and uses the Date_add (), Date_sub () () function to add a specified time interval to a date. The Date_sub () function reduces the specified time interval to a date. The syntax Date_add (date,interval expr type)

/* Date_add (date, interval expr type) and date_sub (date, interval expr type) perform date operations. Date is a datetime or date value, used to specify the start time. Expr is an expression used to specify the time interval value added or

The following query Selects all records. The value of date_col is within the last 30 days: Mysql> SELECT something FROM tableWHERE TO_DAYS (NOW ()-TO_DAYS (date_col) DAYOFWEEK (date)Returns the index of the week of the date (1 = Sunday, 2 = Monday ,

Here is an example of using the date function. The following query Selects all records. The value of date_col is within the last 30 days: Mysql> select something from tableWhere to_days (now ()-to_days (date_col) Dayofweek (date)Returns the

Here is an example of using the date function. The following query Selects all records. The value of date_col is within the last 30 days: Mysql> select something from tableWhere to_days (now ()-to_days (date_col)   Dayofweek (date)Returns the

Mysql-based time processing functions DAYOFWEEK (date) Returns the index of the week of the date (1 = Sunday, 2 = Monday ,...... 7 = Saturday ). These index values correspond to the ODBC standard.Mysql> select DAYOFWEEK ('2017-02-03 ');-> 3 WEEKDAY (

In PHP + MYSQL website development, the time issue occurs. in PHP + MYSQL website development, how does one deal with the time issue? PHP and MYSQL do not directly compare the DateDiff function like ASP and MSSQL. MYSQL5.0 supports DateDiff, but

Convert MySQL datetime functions to bitsCN.com For the description of the valid format of the value range of each type and the specified date and time value, see 7.3.6 date and time type.Here is an example of using the date function. The following

Date_default_timezone_set (' PRC '); Default time zone echo "Today:", Date ("Y-m-d", Time ()), ""; echo "Today:", Date ("Y-m-d", Strtotime ("June 2008")), ""; echo "Yesterday:", Date ("Y-m-d", Strtotime ("-1 Day")), ""; echo

Conversion of the specified format of the millisecond value and date in MySQL and its time function bitsCN.com I. conversion of the millisecond value to the specified date format Use the FROM_UNIXTIME (unix_timestamp, format) function provided by

MySQl date and format timestamp, date, time select type Date_format (order_dt, '% Y-% m-% d') from fact_order_header; Str_to_date (order_dt, '% Y-% m-% d') from fact_order_header; The current date, time, and timestamp. Select current_date,

Mysql commonly used date comparison and computing functions, mysql computing functions Implementation of time comparison in MySql Unix_timestamp () The unix_timestamp function accepts or does not use a parameter. The return value is an unsigned

Description: There is a member table, there is a birthday field, the value is ' YYYY-MM-DD ' format, now to query a time period of the birthday of members, such as ' 06-03 ' to ' 07-08 ' in this time period of all birthday members. SQL statement:

DAYOFWEEK (date)Returns the day of the Week index (1= Sunday, 2 = Monday, ... 7= Saturday). These index values correspond to the ODBC standard.Mysql> Select DAYOFWEEK (' 1998-02-03 ');3 DayOfMonth (date)Returns the date of the month in the range

For the description of the valid format of the value range of each type and the specified date and time value, see 7.3.6 Date and Time type. For the description of the valid format of the value range of each type and the specified date and time