Create tables in batches using shell scripts

Shell script batch table creation 1. I often use shell scripts to batch create tables, count .... while do [SQL stat] done and so on, when create table select * from xxxx where 1 = 2, have you been attacked by the primary key index of primary key auto_increment that your id has not automatically created. 2. Have you ever written function (){...} I have received parameters in the function. Have you ever written $ data = "xxx"? But in the result, you want your function to receive a parameter, but you passed the parameter fun $ data =_^. Haha, in fact, the effect is like this. fun xxx, Haha, I just tried it. So, you should write fun "$ data" 3. for file in 'ls | grep ^ this '. You must have used it. Do you want to cd it to a directory before this command, so, when you echo $ file, will it bring the directory information? Are you sure you want to say that? I got stuck. This is my code. [Plain] function load_game_data2_dbs () {file = $1 echo_log "$ file is importing the Database" <span style = "font-family: Arial, Helvetica, sans-serif; "> ..... </Span> <span style = "font-family: Arial, Helvetica, sans-serif; ">}</span> [plain] for file in 'ls | grep ^ attemp 'do echo_log" has entered the final loop, prepare to export the package "# distribute the file to the raw data on the four databases, on behalf of the auto table load_game_data2_dbs "$ Directory/$ file" echo_log ", the data $ Directory/$ file has been imported into four databases, prepare the file to complete the initial state \ n "# import the package completion mark position on the four databases to the initial state <span style =" font-family: Arial, Helvetica, sans-serif; "> ...... </Span> <span style = "font-family: Arial, Helvetica, sans-serif;"> done </span> in [plain] load_game_data2_dbs, I printed <span style = "font-family: Arial, Helvetica, sans-serif;"> $ Directory/$ file. Then, echo_log also prints </span> <span style = "font-family: Arial, Helvetica, sans-serif;"> $ Directory/$ file, what are the two outputs? I got pitted, but later I learned how to get pitted. In the load_game_data2_dbs function, you need to add the loacl keyword to the file variable. This is completely different from other languages you have learned. </Span>