Data room charging system-granular Data Warehouse collection

The IDC charging system has not been summarized and I don't know what to summarize. Two aspects are taken into account:

Grain Storage: Summarize the Problems and Solutions encountered during programming and debugging.

Ideologically shift: Has gone through the Internet Room charging, ideological shift, a new understanding of programming, and a new positioning.

 

Grain warehouse collection: problems encountered in coding and debugging were not recorded in time, so that the dog and the bear are really "Experiences

".

Cause: the problem encountered at the time was not intuitive and difficult. I tried to solve the problem with Baidu several times and found that

The question is not worth remembering. This leads to missed and missed errors.

Experience-- Do not despise the problem

 

Drying my error form:

1.

2.

3.
Real-time error-2147352571 (80020005)

4.
Real-time error '91 'object variable or with Block Variable not set

5. Real-time error '94 'invalid use of Null Value