231
223
INSERT INTO t1 VALUES(1,1), (1,NULL);
232
224
SELECT * FROM t1 WHERE B is not null;
237
229
INSERT INTO t1 VALUES ('massecot',1101106491),('altec',1101106492),('stitch+',1101106304),('Seb Corgan',1101106305),('beerfilou',1101106263),('flaker',1101106529),('joce8',5),('M4vrick',1101106418),('gabay008',1101106525),('Vamp irX',1101106291),('ZoomZip',1101106546),('rip666',1101106502),('CBP ',1101106397),('guezpard',1101106496);
238
230
DELETE FROM t1 WHERE date<1101106546;
244
236
insert into t1 values (NULL), (NULL);
245
237
delete from t1 where a is null;
246
238
insert into t1 values ('2'), ('3');