摘要：
sql：select LINE_CODE,LINE_CONTENT,(select top 1 GROUP_START_DATE from T_PRODUCT_LINE_GROUP_INFO where T_PRODUCT_LINE_GROUP_INFO.LINE_CODE=T_PRODUCT_LINE_INFO.LINE_CODE order by T_PRODUCT_LINE_GROUP_INFO.GROUP_START_DATE) as stardate from T_PRODUCT_LINE_INFO 作用除了查询出T_PRODUCT_LINE_INFO的所需字段，可以外加一个... 阅读全文
