0. Connect scott/tiger
1. ANALYZE TABLE account COMPUTE STATISTICS
2. select avg_row_len from user_tables where table_name = 'ACCOUNT'
1. ANALYZE TABLE account COMPUTE STATISTICS
2. select avg_row_len from user_tables where table_name = 'ACCOUNT'
1、效率好象不太高。
2、算出来的是平均长度,我要的是数据表结构的记录总字节长,遇到Varchar2型数据没法