5
5
c char(10) NOT NULL default ''
7
7
INSERT INTO t1 VALUES (1,1,'a'),(2,2,'b'),(2,3,'c'),(3,4,'E'),(3,5,'C'),(3,6,'D'),(NULL,NULL,'');
8
8
create table t2 (id int, a bigint not null, c char(10), d int, primary key (a));
9
9
insert into t2 values (1,1,"a",1),(3,4,"A",4),(3,5,"B",5),(3,6,"C",6),(4,7,"D",7);