Orale SQL statements that query annual, monthly, daily statistics
Source: Internet
Author: User
Each year, select To_char (createtime, ' YYYY ') year, COUNT (*) from table GROUP by To_char (Createtime, ' YYYY '); Quarterly select To_char (Create Time, ' Q ') of the Year, COUNT (*) from the table group by To_char (Createtime, ' Q '); monthly select To_char (createtime, ' YYYY '), To_char (creat ETime, ' mm ') month, COUNT (*) from table GROUP by To_char (Createtime, ' YYYY '), To_char (createtime, ' mm '); daily select To_char (Crea Tetime, ' YYYY ') year, To_char (Createtime, ' mm ') month, To_char (createtime, ' DD ') day, COUNT (*) from table GROUP by To_char (Createtime , ' YYYY '), To_char (createtime, ' mm '), To_char (Createtime, ' DD '), where createtime is a date type, and if varchar is first converted to date type
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