摘要: 发现一个SQL执行很慢,如下: select * from rmes.r_wip_tracking_t wt, cmes.c_material_t m where m.material_type = 1 and (m.material_spec like 'L%' or m.material_spec like 'C%') and wt.model_id = m.material_id ... 阅读全文
posted @ 2007-03-29 15:05 Enli 阅读(289) 评论(0) 推荐(0) 编辑