SQL服务器更新从另一表中的行

Question

我有两个表的所有列，一种是sensor_pool，其是改变temp_cel值与定时器间隔

sensor_pool

| address | temp_cels | 
|---------------------| 
| sensor1 | 83C  | 
| sensor2 | 82C  | 
| sensor3 | 85C  | 
| sensor4 | 85C  | 
| sensor5 | 84C  | 

和另一个表sensor_history，我有列动态创建（添加具有传感器地址作为列名称的列）。我能够捕获日期时间，但不能从另一个表中获得temp_cels。

INSERT INTO sensor_history(datetime) VALUES(" & dtfStr & ") 

• dtfStr = timestamp

传感器历史

| datetime | sensor1 | sensor2 | sensor3 | sensor4 | sensor5 | 
|------------------------------------------------------------------| 
| 12022013080513 | NULL | NULL | NULL | NULL | NULL | 

到目前为止，我有这个疑问是里面一个for循环（用于获取列）

IF EXISTS(SELECT datetime FROM sensor_history where datetime='" & dtfStr & "') 
MERGE sensor_history sh USING sensor_pool sp ON [(SELECT '" & dgvSensors.Rows(l).Cells(0).Value & "' 
FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME='sensor_history' AND COLUMN_NAME='" & dgvSensors.Rows(l).Cells(0).Value & "')] = sp.sens_code 
WHEN MATCHED THEN UPDATE SET sh.[" & dgvSensors.Rows(l).Cells(0).Value & "] = st.temp_cels 
WHEN NOT MATCHED BY TARGET THEN INSERT ([" & dgvSensors.Rows(l).Cells(0).Value & "]) VALUES (st.temp_cels);" 

dgvSensors datagridview与sensor_pool表相同。 vb.net + SQL服务器

这是我的目标结果应该是什么：

| datetime | sensor1 | sensor2 | sensor3 | sensor4 | sensor5 | 
|------------------------------------------------------------------| 
| 12022013080513 | 83C | 82C | 85C | 85C | 84C | 

希望有人可以帮助我

谢谢

Answer 1

INSERT INTO sensor_history(datetime,sensor1,sensor2,sensor3,sensor4,sensor5) 
VALUES(getdate(), 
select temp_cels from sensor_pool where address='sensor1', 
select temp_cels from sensor_pool where address='sensor2', 
select temp_cels from sensor_pool where address='sensor3', 
select temp_cels from sensor_pool where address='sensor4', 
select temp_cels from sensor_pool where address='sensor5')