A、DROP INDEX index_name ON talbe_name
B、ALTER TABLE table_name DROP INDEX index_name
C、DROP INDEX table_name.index_name
D、
ALTER TABLE table_name DROP CONSTRAINT index_name
喵查答案:
ALTER TABLE table_name DROP CONSTRAINT index_name
A、DROP INDEX index_name ON talbe_name
B、ALTER TABLE table_name DROP INDEX index_name
C、DROP INDEX table_name.index_name
D、
ALTER TABLE table_name DROP CONSTRAINT index_name
喵查答案:
ALTER TABLE table_name DROP CONSTRAINT index_name