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231
INSERT INTO t1 VALUES(1,1), (1,NULL);
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232
SELECT * FROM t1 WHERE B is not null;
229
237
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);
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238
DELETE FROM t1 WHERE date<1101106546;
236
244
insert into t1 values (NULL), (NULL);
237
245
delete from t1 where a is null;
238
246
insert into t1 values ('2'), ('3');