sql date minus 30 days

The SQL date minus DATEDIFF () returns the number of days between two dates. The definition and usage of the DATEDIFF () function returns the number of days between two dates. The syntax DATEDIFF (date1, date2) date1 and date2 are valid date and

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,

All data for Today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0All data yesterday: SELECT * from table name where DateDiff (dd,datetime Type field, GETDATE ()) =1All data within 7 days: SELECT * from table name

---restore content starts---All data for Today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0All data yesterday: SELECT * from table name where DateDiff (dd,datetime Type field, GETDATE ()) =1All data within 7 days:

All data for Today: SELECT * FROM table name where DateDiff (dd,datetime Type field, GETDATE ()) =0All data yesterday: SELECT * from table name where DateDiff (dd,datetime Type field, GETDATE ()) =1All data within 7 days: SELECT * from table name

1. Error Reason:The date type cannot contain the precision after the second.As Date: 2010-01-01 20:02:20.0 Workaround: Remove the precision after the date secondsAs a date: 2010-01-01 20:02:20 2, INSERT into TEST2 (C1, C2,C3) VALUES

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

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

Data-id= "1190000005009280" data-license= "CC" > Some variable description: Add_time is the insertion time to_days is an SQL function that returns the number of days data_sub (Date,interval expr type) to the specified date minus how many days the