The first time you get to know the database, you get to know your friends.

The first time you get to know the database, you get to know your friends.

The past few days of coming to the lab have been very full and have been exposed to many new technologies. At first, I felt very strange, but it was very interesting to come into contact with them, especially when you can operate on them, A sense of accomplishment.

Yesterday morning, Senior Guo Liang told us about the database SQL statements. At that time, they were all masked. In the afternoon, they assigned us a job to write tables using SQL statements. No way. I only had to stick my head to it. If I had no idea, I went to w3school to check the website. I was barely able to write it. I think this website is really good. It contains many computer technologies, such as HTML, CSS, javaScrip, Web ...... I think this is a good basic knowledge for beginners.

The biggest problem encountered by SQL is the setting of Foreign keys. I tried to use the code on the Internet. However, I always reported errors during the operation, and I was in a real hurry. Then, at noon today, I went to the Internet to check the primary keys and Foreign keys in SQL. It turns out that the primary keys in one table must be connected to the primary keys in another table, each table should have a unique primary key and cannot be NULL.

This afternoon, I am still writing Java code to connect the data in SQL. This is the biggest problem, because the students have never touched those programs before and have no information to check, I can only refer to the Long Hair code. Some code can't understand what its function is, and why should it be written like this? After a night, there is still no progress, I can only ask my classmates tomorrow.

When I went back to my bedroom in the evening, I watched some photoshop videos. I thought it was very interesting. I followed the steps on the video and watched a picture be modified, which aroused my interest.

I think there are a lot of technologies to learn, and the time is very short. I have to hurry up to learn and improve the learning efficiency.

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