下列 SQL的数据定义语句组中,哪一组是正确的?
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
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正确答案: B 答案分析:无
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A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯
A.CREATE SCHEMA... ,DROP SCHEMA ⋯,ALTER SCHEMA ⋯
B.CREATE TABLE...... ,DROP TABLE....,ALTER TABLE....
C. CREATE VIEW..:,DROP VIEW...,ALTER VIEW ⋯
D.CREATE INDEX...,DROP INDEX⋯,ALTER INDEX ⋯