使用bash将csv文件数据读写到MySQL数据库的脚本之一_MySQL

1,Navin M,98,CS
2,Kavya N,70,CS
3,Nawaz O,80,CS
4,Hari S,80,EC
5,Alex M,50,EC
6,Neenu J,70,EC
7,Bob A,30,EC
8,Anu M,90,AE
9,Sruthi,89,AE
10,Andrew,89,AE

#!/bin/bash
#filename : create_db.sh
#use : create mysql database and tables

USER="root"
PASS="123456"
SOCKET="/data/mysqldata/3306/mysql.sock"

mysql -u $USER -p$PASS -S $SOCKET < /dev/null
create database students;
EOF

[ $? -eq 0 ] && echo Created DB || echo DB already exist
mysql -u $USER -p$PASS -S $SOCKET students < /dev/null
create table students(
id int,
name varchar(100),
mark int,
dept varchar(4)
);
EOF

[ $? -eq 0 ] && echo Created table students || echo Table students already exist

mysql -u $USER -p$PASS -S $SOCKET students <

脚本二、将数据插入数据表的脚本如下：
#!/bin/bash
#filename : write_to_db.sh
#use : read data from csv files and insert into mysql db

USER="root"
PASS="123456"
SOCKET="/data/mysqldata/3306/mysql.sock"

if [ $# -ne 1 ];
then
 echo $0 DATAFILE
 echo
 exit 2
fi
data=$1

while read line;
do
 oldIFS=$IFS
 IFS=,
 values=($line)
 values[1]="\"`echo ${values[1]} | tr ' ' '#' `\""
 values[3]="\"`echo ${values[3]}`\""

 query=`echo ${values[@]} | tr ' #' ', ' `
 IFS=$oldIFS
 
 mysql -u $USER -p$PASS -S $SOCKET students <

脚本三、查询数据库的脚本如下：
#!/bin/bash
#filename: read_db.sh
#use : read data from mysql db

USER="root"
PASS="123456"
SOCKET="/data/mysqldata/3306/mysql.sock"

depts=`mysql -u $USER -p$PASS -S $SOCKET students <

脚本按照顺序执行结果如下：
# chmod +x create_db.sh write_to_db.sh read_db.sh
# ./create_db.sh 
DB already exist
Table students already exist
# 
# ./write_to_db.sh studentdata.csv 
Wrote data into DB
# 
# ./read_db.sh 
Department : CS
rank name mark
1 Navin M 98
2 Nawaz O 80
3 Kavya N 70

Department : EC
rank name mark
1 Hari S 80
2 Neenu J 70
3 Alex M 50
4 Bob A 30

Department : AE
rank name mark
1 Anu M 90
2 Sruthi 89
3 Andrew 89

在MySQL数据库中确认插入后结果：
mysql> 
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| students |
| test |
+--------------------+
5 rows in set (0.00 sec)

mysql> 
mysql> use students;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> 
mysql> show tables;
+--------------------+
| Tables_in_students |
+--------------------+
| students |
+--------------------+
1 row in set (0.00 sec)

mysql> 
mysql> select * from students;
+------+---------+------+------+
| id | name | mark | dept |
+------+---------+------+------+
| 1 | Navin M | 98 | CS |
| 2 | Kavya N | 70 | CS |
| 3 | Nawaz O | 80 | CS |
| 4 | Hari S | 80 | EC |
| 5 | Alex M | 50 | EC |
| 6 | Neenu J | 70 | EC |
| 7 | Bob A | 30 | EC |
| 8 | Anu M | 90 | AE |
| 9 | Sruthi | 89 | AE |
| 10 | Andrew | 89 | AE |
+------+---------+------+------+
10 rows in set (0.00 sec)

mysql>