SQL-W3School: SQL UPDATE statement

ylbtech-SQL-W3School: SQL UPDATE statement

 

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Update statement

Update statement to modify tables of data .

grammar:

SET UPDATE table name WHERE column name = the new value of a column name = value

Person:

LastName	FirstName	Address	City
Gates	Bill	Xuanwumen 10	Beijing
Wilson		Champs Elysees

Update a column in a row

We add to firstname lastname is "Wilson" people:

UPDATE Person SET FirstName = 'Fred' WHERE LastName = 'Wilson' 

result:

LastName	FirstName	Address	City
Gates	Bill	Xuanwumen 10	Beijing
Wilson	Fred	Champs Elysees

Update several columns in a row

We will modify the address (address), and add the city name (city):

UPDATE Person SET Address = 'Zhongshan 23', City = 'Nanjing'
WHERE LastName = 'Wilson'

result:

LastName	FirstName	Address	City
Gates	Bill	Xuanwumen 10	Beijing
Wilson	Fred	Zhongshan 23	Nanjing

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https://www.w3school.com.cn/sql/sql_update.asp

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Author: ylbtech Source: http://ylbtech.cnblogs.com/ This article belongs to the author and blog Park total, welcome to reprint, but without the author's consent declared by this section must be retained, and given the original connection in the apparent position of the article page, otherwise reserves the right to pursue legal responsibilities.