mysql timestamp

depressed. Of course, MySQL also developed the corresponding gui tool, of course, exe. Many users of the network service program MySQL are renting virtual hosts, which seems to be a luxury. Hoho, now I have another question. Today's topic is to use the timestamp type in MySQL. 2. do it by yourself. Previously, the dat

I have a field timestamp in the mysql database. how can I query data between different time ranges? mysql nbsp; has a field Reg_addtime, which is the time value stored in the timestamp mode. How can I query, for example, the list of registered members from January 1, May 1, 2013 to January 1, May 10, 2013. I am not sa

Int (1). 4 byte storage, the length of the int is 4 bytes, the storage space is less than datatime, the int index storage space is also relatively small, the sorting and the query efficiency is relatively higher a little(2) The readability is extremely poor, cannot see the data intuitively, may make you very irritated TIMESTAMP (1) 4 bytes Storage(2) Value saved in UTC format(3) Time zone conversion, storage time for the current time zone conversio

section. MySQL retrieves and displays the DATE value in 'yyyy-MM-DD 'format. The supported range is '2017-01-01' to '2017-12-31 '. TIMESTAMPThe column type provides a type that you can use to automatically mark the INSERT or UPDATE operation with the current date and time. TIMEData Type indicates the time in a day. MySQL retrieves and displays the TIME value in the format of "HH: MM: SS. The supported ra

On the day of query by php and mysql, this week is queried, and the data instance of this month is queried (the field is a timestamp ). On the day of query by php and mysql, this week is queried to query the data instance of this month (the field is a timestamp) // Where video is the table name; // createtime is the fi

Programmers who have written PHP + MySQL know that there is a time difference. UNIX timestamps and formatting dates are two forms of time representation that we often deal with. The Unix timestamps are easy to store and process, but not intuitive, the date format is intuitive, but it is not as easy to process as the Unix timestamp, so sometimes it needs to be converted to each other. Below are several conve

Programmers who have written PHP + MySQL know that there is a time difference. UNIX timestamps and formatting dates are two forms of time representation that we often deal with. The UNIX timestamps are easy to store and process, but not intuitive, the date format is intuitive, but it is not as easy to process as the Unix timestamp, so sometimes it needs to be converted to each other. Below are several conve

Programmers who have written PHP + MySQL know that there is a time difference. UNIX timestamps and formatting dates are two forms of time representation that we often deal with. The Unix timestamps are easy to store and process, but not intuitive, the date format is intuitive, but it is not as easy to process as the Unix timestamp, so sometimes it needs to be converted to each other. Below are several conve

1, datetime,date,time,year Four types of values, can be entered manually, you can also call the function to get the value① manual input, in the following format:DateTime "2016-6-22 14:09:30"Date "2016-6-22"Time "14:09:30"Year "2016"As mentioned above, when manually entered, you can directly enter the string as above, note the need to quote. Where the delimiter in the date and time (the short horizontal line "-", the time of the colon ":"), can be replaced by other symbols, such as "2016/6/22 14/

Label:The timestamp type in MySQL can set default values, just like any other type. Table:——————————————————————————————————————T1 CREATE TABLE ' T1 ' (' P_c ' int (one) is not NULL,' P_time ' timestamp not NULL DEFAULT current_timestamp on UPDATE current_timestamp) Engine=innodb DEFAULT charset=gb2312 1 2007-10-08 11:53:352 2007-10-08 11:54:00 Update t1 Set p_c

Difference and advantages of timestamp, datetime, int type in mysql, timestampdatetime The difference between timestamp, datetime, and int types in mysql and int1. 4 bytes are occupied. after an index is created, the query speed is high. 3. conditional range search can use between4. the time function provided by

TIMESTAMP the default value for the setting is Current_timestampTIMESTAMP settings automatically update as the table changes is on update current_timestampBut becauseThere can be at most one field set in a table Current_timestampIt is not possible to set the default Current_timestamp on both lines.There's one more thing to note.CREATE TABLE' device ' (' ID ' )INT(Ten) UNSIGNED not NULLauto_increment, ' toid 'INT(Ten) UNSIGNED not NULL DEFAULT '0'COMME

The difference between timestamp,datetime,int types in MySQL and their pros and cons int1. Occupies 4 bytes of 2. After indexing, the query is 3 faster. Conditional range searches can be used using BETWEEN4. You cannot use the time function provided by MySQL conclusion: it is suitable for data table datetime1 which need to make large time range query. Occupies 8

Label:The original address http://database.51cto.com/art/200905/124240.htm a comparison between datetime and timestamp in MySQLThis article compares the datetime and timestamp in MySQL with an example, although these two methods actually represent the same type, but there are some differences. AD: Same Show The timestamp