Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to update a timestamp field of a MySQL table?
Let us first create a table −
mysql> create table DemoTable -> ( -> PunchOut timestamp, -> PunchStatus tinyint(1) -> ); Query OK, 0 rows affected (0.51 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('2019-01-31 6:30:10',1); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('2019-02-06 4:10:13',0); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('2018-12-16 03:00:30',0); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('2016-11-25 02:10:00',1); Query OK, 1 row affected (0.22 sec)
Display all records from the table using select statemen −
mysql> select *from DemoTable;
Output
+---------------------+-------------+ | PunchOut | PunchStatus | +---------------------+-------------+ | 2019-01-31 06:30:10 | 1 | | 2019-02-06 04:10:13 | 0 | | 2018-12-16 03:00:30 | 0 | | 2016-11-25 02:10:00 | 1 | +---------------------+-------------+ 4 rows in set (0.00 sec)
Here is the query to update the timestamp field of a MySQL table. We have set current date to the fields with PunchStatus 0 −
Note − Current date and time is 2019-06-30 13:43:45
mysql> update DemoTable set PunchOut=now() where PunchStatus=0; Query OK, 2 rows affected (0.19 sec) Rows matched: 2 Changed: 2 Warnings: 0
Let us check the table records once again −
mysql> select *from DemoTable;
Output
+---------------------+-------------+ | PunchOut | PunchStatus | +---------------------+-------------+ | 2019-01-31 06:30:10 | 1 | | 2019-06-30 13:43:45 | 0 | | 2019-06-30 13:43:45 | 0 | | 2016-11-25 02:10:00 | 1 | +---------------------+-------------+ 4 rows in set (0.00 sec)
Updated on: 30-Jul-2019
2K+ Views
Advertisements