[SQL] at a certain correlation with a table of data update another table

Event

When writing a MySQL statement, I want to implement the function of "using the field value in one table to update the field value in another table"

The two tables are structured as follows:

t1 table:

t2 table:

After querying data, write the following statement:

update t1set aaa=t2.aaafrom t2where bbb=t2.bbb;

Error after execution:

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'from t2 where bbb=t2.bbb' at line 3

After querying the data, I found that the above writing method is the writing method of SQL Server, so an error will be reported in MySQL

Similarly written in MySQL:

update t1,t2set t1.aaa=t2.aaawhere t1.bbb=t2.bbb;

Summary

In MySQL, use the field value in one table to update the field value in another table:

update tabel_dest,table_srcset tabel_dest.attr = table_src.attrwhere condition;

In SQL Server, use the field value in one table to update the field value in another table:

update tabel_destset attr = table_src.attrfrom table_srcwhere condition;