SQL Server：将数据从一个表复制到另一个表

Question

I want to update Table2 names with names from Table1 with matching Ids

I have around 100 rows in each table.

Here is my sample tables.

Table1

• ID
• Name

Table2

• ID
• Name

Sample data

Table1

    ID |Name
    --------
     1 |abc
     2 |bcd

Table2

    ID |Name
    --------
     1 |xyz
     2 |OOS

Expected result

Table2

    ID |Name
    --------        
     1 |abc
     2 |bcd

How can I do this?

Answer 1

You can use an UPDATE with a JOIN of the two tables on the id field:

update t2
set t2.name = t1.name
from table2 t2
inner join table1 t1
  on t2.id = t1.id

See SQL Fiddle with Demo