44 lines
989 B
SQL
44 lines
989 B
SQL
DROP TABLE cons_demo;
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CREATE TABLE cons_demo (owner varchar2(100), object_name varchar2(128));
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INSERT /*+ APPEND */ INTO cons_demo SELECT owner, object_name FROM dba_objects;
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COMMIT;
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SELECT COUNT(*) FROM cons_demo;
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@x
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CREATE INDEX idx1_cons_demo ON cons_demo(owner);
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SELECT COUNT(*) FROM cons_demo;
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@x
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SELECT /*+ INDEX(cons_demo cons_demo(owner)) */ COUNT(*) FROM cons_demo;
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ALTER TABLE cons_demo MODIFY owner NOT NULL NOVALIDATE;
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INSERT INTO cons_demo VALUES (null, 'x');
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SELECT COUNT(*) FROM cons_demo;
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@x
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ALTER TABLE cons_demo MODIFY owner NULL;
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--ALTER TABLE cons_demo MODIFY owner NOT NULL VALIDATE;
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--ALTER TABLE cons_demo MODIFY owner NOT NULL DEFERRABLE INITIALLY DEFERRED VALIDATE;
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ALTER TABLE cons_demo MODIFY owner NOT NULL DEFERRABLE VALIDATE;
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SELECT COUNT(*) FROM cons_demo;
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@x
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DROP TABLE cons_demo2;
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CREATE TABLE cons_demo2 AS SELECT * FROM scott.emp;
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ALTER TABLE cons_demo2 ADD CONSTRAINT c2 CHECK (SAL > 500);
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SELECT * FROM cons_demo2 WHERE sal = 100;
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@x
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