extract date from datetime sql

Date functionDate functions manipulate Date values (fields of date type), timestamp values (TIMESTAMP, TIMESTAMP with time ZONE, and TIMESTAMP with the fields of the local time ZONE type), and interval values (INTERVAL day to SECOND and INTERVAL

MySQL date data type and time type usage summary MySQL date type: Date format, storage space occupied, date range comparison. Date type storage space date format date range -----------------------------------------------------------------------------

MySQL date type: Date Format, storage space occupied, and date range comparison.Date type storage space date format date range-----------------------------------------------------------------------------------Datetime 8 bytes YYYY-MM-DD hh: mm: SS 10

Using date types in PL/SQLThe previous article described the use of strings and numbers in PL/SQL. There is no doubt that strings and numbers are important, but you can be sure that no application is dependent on the date.You need to record events,

1.1 Get the current date + time (date + times) function: Now ()Mysql> Select Now (); + ——————— + | Now () | + ——————— + | 2013-04-08 20:56:19 | + ——————— +In addition to the now () function to get the current datetime, MySQL has the following

functions for date, time \ Timestamp in SQL statements in MySQL databaseOne MySQL gets the current date time function1.1 Get the current date + time (date + times) function: Now ()Mysql> Select Now ();+―――――――+| Now () |+―――――――+| 2008-08-08 22:20:46

MySQL: Summary of date functions and time functions bitsCN.com Published inWww.sqlstudy.com1. MySQL obtains the current date and time function 1.1 obtain the current date + time (date + time) function: now () mysql> select now();+-------------------

MySql intercepts the DateTime field's date value, mysqldatetime Use DATE_FORMAT to format the Date Field SELECT DATE_FORMAT(crt_time,'%Y-%m-%d') FROM ad_n_advertise_t In mysql, how does one obtain the year and month of a date field? For example,

SQL has many built-in functions that can be used for counting and computation.Syntax of the functionThe syntax for the built-in SQL function is:SELECT function (column) from tableTypes of functionsIn SQL, there are several kinds of basic function

Oracle date functions:There are many date functions in oracle, such:1. add_months () is used to increase or decrease the number of months from a date value.Date_value: = add_months (date_value, number_of_months)Example:SQL> select add_months