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C linq to sql

var q = from c in db.Customers where c.City == "London" select c 等价于SQL语句 select * from db.Customers c where c.City = "London" 然后把记录集赋给变量q foreach (var v in q) 表示记录集q里的每一条记录v要执行下马{}里的操作

linq语句是 from p in username where p.IndexOf("王") == 0 select p; 这里的username代表查询对象,p是随意的,它可以是任何字符(p in username 表示p是username的元素)。 p.IndexOf("王") == 0 查询不以”王“开头的数据。

先为table1表的字段1a创建序列s_1a,然后insert into table1(1a,1b,1c) values(); for v_row in (Select t1.2b,t1.2c from table2 t1,table3 t2 where t1.2a=t2.3a and 3b>10) loop insert into table1(1a,1b,1c) values(s_1a.nextval,v_row.2b,v...

query = from c in tbs where c.sx != "类别" && c.path_tbname.Contains(tName.Text) orderby c.id select c; Contains 等于 like '%'+tName.Text+'%'

query = from c in tbs where c.sx != "类别" && c.path_tbname.Contains(tName.Text) orderby c.id select c; Contains 就等于 like '%'+tName.Text+'%'

query = from c in tbs where c.sx != "类别" && c.path_tbname.Contains(tName.Text) orderby c.id select c; Contains 就等于 like '%'+tName.Text+'%'

query = from c in tbs where c.sx != "类别" && c.path_tbname.Contains(tName.Text) orderby c.id select c; Contains 就等于 like '%'+tName.Text+'%'

query=fromcintbswherec.sx!="类别"&&c.path_tbname.Contains(tName.Text)orderbyc.idselectc;Contains等于like'%'+tName.Text+'%'

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