.游标方式
DECLARE @Data NVARCHAR(max)
SET @Data='1,tanw;2,keenboy' --Id,Name
DECLARE @dataItem NVARCHAR(100)
DECLARE data_cursor CURSOR FOR (SELECT * FROM split(@Data,';'))
OPEN data_cursor
FETCH NEXT FROM data_cursor INTO @dataItem
WHILE @@FETCH_STATUS=0
BEGIN
DECLARE @Id INT
DECLARE @Name NVARCHAR(50)
DECLARE dataItem_cursor CURSOR FOR (SELECT * FROM split(@dataItem,','))
OPEN dataItem_cursor
FETCH NEXT FROM dataItem_cursor INTO @Id
FETCH NEXT FROM dataItem_cursor INTO @Name
CLOSE dataItem_cursor
DEALLOCATE dataItem_cursor
/*
在这里做逻辑处理，插入或更新操作 ...
*/
END
CLOSE data_cursor
DEALLOCATE data_cursor
.While方式
DECLARE @Data NVARCHAR(max)
SET @Data='tanw,keenboy' --Id,Name
DECLARE @Temp TABLE
(
Id INT IDENTITY(1,1),
Name NVARCHAR(50)
)
DECLARE @Id INT
DECLARE @Name NVARCHAR(50)
DECLARE @Results NVARCHAR(MAX) SET @Results=''
INSERT INTO @Temp SELECT (SELECT * FROM split(@Data,';'))
WHILE EXISTS(SELECT * FROM @Temp)
BEGIN
SELECT TOP 1 @Id=Id,@Name=Name from @Temp
DELETE FROM @Temp where [id] = @Id
SET @Results=@Results+@Name+','
/*
在这里做逻辑处理，插入或更新操作 ...
*/
END
SELECT @Results
//---------下面的方式比较适合----------//
BCP方式:
/// <summary>/// 大批量插入数据(2000每批次)/// 已采用整体事物控制/// </summary>/// <param name="connString">数据库链接字符串</param>/// <param name="tableName">数据库服务器上目标表名</param>/// <param name="dt">含有和目标数据库表结构完全一致(所包含的字段名完全一致即可)的DataTable</param>public static void BulkCopy(string connString, string tableName, DataTable dt)
{ using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open();
using (SqlTransaction transaction = conn.BeginTransaction())
{
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(conn, SqlBulkCopyOptions.Default, transaction))
{
bulkCopy.BatchSize = 2000;
bulkCopy.BulkCopyTimeout = _CommandTimeOut;
bulkCopy.DestinationTableName = tableName;
try
{
foreach (DataColumn col in dt.Columns)
{
bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName);
}
bulkCopy.WriteToServer(dt);
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
throw ex;
}
finally
{
conn.Close();
}
}
}
}
}/// <summary>/// 批量更新数据(每批次5000)/// </summary>/// <param name="connString">数据库链接字符串</param>/// <param name="table"></param>public static void Update(string connString, DataTable table)
{ SqlConnection conn = new SqlConnection(connString);
SqlCommand comm = conn.CreateCommand();
comm.CommandTimeout = _CommandTimeOut;
comm.CommandType = CommandType.Text;
SqlDataAdapter adapter = new SqlDataAdapter(comm);
SqlCommandBuilder commandBulider = new SqlCommandBuilder(adapter);
commandBulider.ConflictOption = ConflictOption.OverwriteChanges;
try
{
conn.Open();
//设置批量更新的每次处理条数
adapter.UpdateBatchSize = 5000;
adapter.SelectCommand.Transaction = conn.BeginTransaction();/////////////////开始事务
if (table.ExtendedProperties["SQL"] != null)
{
adapter.SelectCommand.CommandText = table.ExtendedProperties["SQL"].ToString();
}
adapter.Update(table);
adapter.SelectCommand.Transaction.Commit();/////提交事务
}
catch (Exception ex)
{
if (adapter.SelectCommand != null && adapter.SelectCommand.Transaction != null)
{
adapter.SelectCommand.Transaction.Rollback();
}
throw ex;
}
finally
{
conn.Close();
conn.Dispose();
}
}