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create table t1(a int, b timestamp);
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alter table t1 add primary key(a);
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create table t1(a int, b timestamp default 20050102030405);
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alter table t1 add primary key(a);
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create table t1 (date date not null);
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create table t2 select date from t1;
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comment='123456789*123456789*123456789*123456789*123456789*123456789*';
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create table t1(col1 int, col2 int,