1.統(tǒng)計(jì)某個(gè)屬性某個(gè)條件的總行數(shù)
select count(*) from tablename where ‘條件’;
2.刪除某個(gè)屬性某種條件的所有行
delect from tablename where '條件'谦纱;
1.統(tǒng)計(jì)某個(gè)屬性某個(gè)條件的總行數(shù)
select count(*) from tablename where ‘條件’;
2.刪除某個(gè)屬性某種條件的所有行
delect from tablename where '條件'谦纱;