11 lines
264 B
SQL
11 lines
264 B
SQL
CREATE TABLE t1(a PRIMARY KEY, x UNIQUE);
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CREATE TABLE t2(a PRIMARY KEY, y UNIQUE);
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INSERT INTO t1 VALUES ('a','m'),('b','n'),('c','o');
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INSERT INTO t2 VALUES ('b','k'),('c','l');
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SELECT a FROM t1
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INTERSECT
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SELECT a FROM t2;
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ALTER TABLE t2 ADD COLUMN extra_col; |