MySQL：通过来自其他表的值更新列值

Question

There is 2 MySQL tables as:

table1
id   name   phone

table2
id   phone

The record count > 20 billions.

How to update table1.phone by values from table2.phone where table1.id = table2.id?

My version is :

mysql  Ver 15.1 Distrib 5.5.64-MariaDB, for Linux (x86_64) using readline 5.1

Answer 1

You seem to want the update ... join syntax:

update table1 t1
inner join table2 t2 on t1.id = t.id
set t1.phone = t2.phone