根据多表条件更新表.............. 一条sql语句.............

CREATE TABLE a(
    NAME INT,
    age int
)
CREATE TABLE b(
    height INT,
    weight int
)
INSERT INTO a VALUES (1,2)
INSERT INTO b VALUES (2,3)
SELECT * FROM a;
SELECT * FROM b
SELECT * FROM a
UPDATE ab SET ab.name=ac.height FROM a AS ab ,b AS ac WHERE ab.age=ac.height