例如:String sql = "select * from user where username='" + username + "' and password ='" + password + "' ";执行的时候自动就把变量转换为字符串类型,“”表示字符串,‘’是SQL的字符串和字符两个双引号和变量拼接在一起,会吧变量转化为字符串执行SQL的时候是这样的select * from user where username='' and pa
批量插入表(表数据插表) ****1.INSERT INTO SELECT语句语句形式为:Insert into Table2(field1,field2,...) select value1,value2,... from Table1要求目标表Table2必须存在,由于目标表Table2已经存在,所以我们除了插入源表Table1的字段外,还可以插入常量.示例如下: 2.SELECT INTO FROM语句语句形式为:SELECT vale1, value2 into Table2 from
把t_table1中数据插入到t_table中,同时确保t_table中不会有重复的项 insert into t_table (column1,column2,column3) select column1,column2,column3 from t_table1 where column1='1' AND not column1 in (select column1 from t_table)
set @InsertStr='INSERT INTO [dbo].[T_SchoolPercentMonth]([SchoolID],[MonthOfYear],[PercentNum]) VALUES('''+cast(@SchoolID as nvarchar)+''','''+convert(char(7),getdate(),20) +''','+cast(@PercentNum as nvarchar)+')'; 引用字符 加一对单引号. 'select * from tb wher
#region 使用SqlBulkCopy public static bool ExecuteTransactionScopeInsert(DataTable dt, int batchSize) { int count = dt.Rows.Count; string tableName = "TestTable"; int copyTimeout = 600; bool flag = false; try { using (SqlConnection cn = new SqlCon
SET NOCOUNT ON IF (OBJECT_ID('TB' ) IS NOT NULL ) DROP TABLE TB GO CREATE TABLE TB(ID INT IDENTITY (,),NAME VARCHAR()) GO INSERT INTO TB(NAME) SELECT ),isnull(@@IDENTITY,)+) GO --GO 后面为执行的次数 SET NOCOUNT OFF SELECT * FROM TB
从外部EXCEl文件导入sqlserver数据库操作命令 reconfigure reconfigure go select * into abc1_1 from OPENROWSET('MICROSOFT.JET.OLEDB.4.0' ,'Excel 5.0;HDR=YES;DATABASE=文件路径',SQLResults$) 注意:文件路径到excel下某个固定的sheet,sheet名字不要有空格 数据库合并 insert into [新数据库名(合并后的)] select [字段] F