sql

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 -- 首先是删除该数据库中该用户名下的所有表、序列与触发器， -- 其中触发器是通过表格级联删除的。 declare cursor usertables is select * from user_tables where table_name not like 'BIN$%'; cursor usersequences is select * from user_sequences; begin for next_row in usertables loop execute immediate 'drop table ' || next_row.