It will be slow for you to insert data by calling database operation functions one by one in the program. You should use the following SQL statement to complete it in one sentence. You only need to perform a database operation once in the program, so you can ignore the database more quickly. In addition to being inserted into table 2, select * from table 1, where * * * *

You can also choose to enter table 2 * from table 1, where * * * *

If you want to perform a slightly more complicated operation, such as data analysis, you can build a stored procedure or user function in the database. If you have complex analysis results, you can set up a table to store them. After the call is completed, you can query this table.