在mac上安裝mysql和Workbench很快，主要是在匯入csv資料時踩了很多的坑。

啟動mysql

在system preferences中點選MySql，即可進入啟動mysql的介面。在terminal中輸入輸入 mysql -u root -p, 輸入密碼即可登陸mysql。

匯入資料前，請確保匯入的資料是csv的格式，主要是我原本的資料就是csv格式，沒有嘗試匯入xlsx格式的資料。在其他網頁上看到必須匯入的資料必須是csv格式。匯入資料，最主要是要清楚所有資料的格式再確定該列在資料庫中的型別，例如：user_id中存在字元，若將user_id的型別設定為INT，匯入資料遇到該列的值為字串時，就會出現Incorrect integer value：的問題。

匯入資料主要有兩種方法：

第一種是直接在Workbench中直接匯入，匯入之前可以不用先建表；

第二種是在terminal中匯入，這方法匯入的速度要快很多，但得匯入資料之前就要建好資料表。

1、將資料匯入mysql時出現了ERROR 1290 (HY000): The MySQL server is running with the --secure-file-priv option so it cannot execute this statement 的錯誤；

解決方法：可以用show variables like ‘%secure%’；命令檢視secure-file-priv的值。如果value的值為null，則為禁止；如果值為資料夾目錄，則只允許該目錄下檔案；如果值為空，則不限制目錄。但是現在版本的mysql在/etc/下沒有my.cnf檔案，所以可以在這個網址中

   cd /etc

   sudo vim my.cnf

如果不用sudo會出現不能儲存的問題！

# Example MySQL config file for medium systems.  
  #  
  # This is for a system with little memory (32M - 64M) where MySQL plays  
  # an important part, or systems up to 128M where MySQL is used together with  
  # other programs (such as a web server)  
  #  
  # MySQL programs look for option files in a set of  
  # locations which depend on the deployment platform.  
  # You can copy this option file to one of those  
  # locations. For information about these locations, see:  
  # http://dev.mysql.com/doc/mysql/en/option-files.html  
  #  
  # In this file, you can use all long options that a program supports.  
  # If you want to know which options a program supports, run the program  
  # with the "--help" option.  
  # The following options will be passed to all MySQL clients  
  [client]
  default-character-set=utf8
  #password   = your_password  
  port        = 3306  
  socket      = /tmp/mysql.sock   
  # Here follows entries for some specific programs  
  # The MySQL server  
  [mysqld]
  character-set-server=utf8
  init_connect='SET NAMES utf8
  port        = 3306  
  socket      = /tmp/mysql.sock  
  skip-external-locking  
  key_buffer_size = 16M  
  max_allowed_packet = 1M  
  table_open_cache = 64  
  sort_buffer_size = 512K  
  net_buffer_length = 8K  
  read_buffer_size = 256K  
  read_rnd_buffer_size = 512K  
  myisam_sort_buffer_size = 8M  
  character-set-server=utf8  
  init_connect='SET NAMES utf8' 
# Don't listen on a TCP/IP port at all. This can be a security enhancement,  
# if all processes that need to connect to mysqld run on the same host.  
# All interaction with mysqld must be made via Unix sockets or named pipes.  
# Note that using this option without enabling named pipes on Windows  
# (via the "enable-named-pipe" option) will render mysqld useless!  
#   
#skip-networking  
  
  # Replication Master Server (default)  
  # binary logging is required for replication  
  log-bin=mysql-bin  
    
    # binary logging format - mixed recommended  
    binlog_format=mixed  
      
      # required unique id between 1 and 2^32 - 1  
      # defaults to 1 if master-host is not set  
      # but will not function as a master if omitted  
      server-id   = 1  
        
    # Replication Slave (comment out master section to use this)  
    #  
    # To configure this host as a replication slave, you can choose between  
    # two methods :  
    #  
    # 1) Use the CHANGE MASTER TO command (fully described in our manual) -  
    #    the syntax is:  
    #  
    #    CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,  
    #    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;  
    #  
    #    where you replace <host>, <user>, <password> by quoted strings and  
    #    <port> by the master's port number (3306 by default).  
    #  
    #    Example:  
    #  
    #    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,  
    #    MASTER_USER='joe', MASTER_PASSWORD='secret';  
    #  
    # OR  
    #  
    # 2) Set the variables below. However, in case you choose this method, then  
    #    start replication for the first time (even unsuccessfully, for example  
    #    if you mistyped the password in master-password and the slave fails to  
    #    connect), the slave will create a master.info file, and any later  
    #    change in this file to the variables' values below will be ignored and  
    #    overridden by the content of the master.info file, unless you shutdown  
    #    the slave server, delete master.info and restart the slaver server.  
    #    For that reason, you may want to leave the lines below untouched  
    #    (commented) and instead use CHANGE MASTER TO (see above)  
    #  
    # required unique id between 2 and 2^32 - 1  
    # (and different from the master)  
    # defaults to 2 if master-host is set  
    # but will not function as a slave if omitted  
    #server-id       = 2  
    #  
    # The replication master for this slave - required  
    #master-host     =   <hostname>  
    #  
    # The username the slave will use for authentication when connecting  
    # to the master - required  
    #master-user     =   <username>  
    #  
    # The password the slave will authenticate with when connecting to  
    # the master - required  
    #master-password =   <password>  
    #  
    # The port the master is listening on.  
    # optional - defaults to 3306  
    #master-port     =  <port>  
    #  
    # binary logging - not required for slaves, but recommended  
    #log-bin=mysql-bin  
      
      # Uncomment the following if you are using InnoDB tables  
      #innodb_data_home_dir = /usr/local/mysql/data  
      #innodb_data_file_path = ibdata1:10M:autoextend  
      #innodb_log_group_home_dir = /usr/local/mysql/data  
      # You can set .._buffer_pool_size up to 50 - 80 %  
      # of RAM but beware of setting memory usage too high  
      #innodb_buffer_pool_size = 16M  
      #innodb_additional_mem_pool_size = 2M  
      # Set .._log_file_size to 25 % of buffer pool size  
      #innodb_log_file_size = 5M  
      #innodb_log_buffer_size = 8M  
      #innodb_flush_log_at_trx_commit = 1  
      #innodb_lock_wait_timeout = 50  
        
        [mysqldump]  
        quick  
        max_allowed_packet = 16M  
          
          [mysql]  
          no-auto-rehash  
          # Remove the next comment character if you are not familiar with SQL  
          #safe-updates  
          default-character-set=utf8   
            
        [myisamchk]  
        key_buffer_size = 20M  
        sort_buffer_size = 20M  
        read_buffer = 2M  
        write_buffer = 2M  
          
          [mysqlhotcopy]  
          interactive-timeout
 

 2、這個時候如果將資料匯入時出現了

ERROR 13 (HY000): Can't get stat of '/Users/zhangxin/Desktop/pool_oto/ccf_online_stage1_train.csv' (OS errno 13 - Permission denied)的錯誤

解決方法：用show variables like '%tmpdir%'; 檢視mysql預設使用的臨時目錄，將檔案轉到該臨時目錄下即可；還有一種方法是將load data infile 改為load data local infile(待考證）http://www.360doc.com/content/15/1231/20/1073512_524491459.shtml

3、mysql匯入資料時出現了Incorrect integer value: 'null' for column的問題。

解決方法：用python將NaN值轉換為空值，再匯入到資料庫

最後成功運用著一段程式碼匯入成功！！！！！！！

python程式碼：

import pandas as pd

data = pd.read_csv('/var/tmp/pool_oto/ccf_online_stage1_train.csv')

df = data.where(data.notnull(),'') #將NaN轉換為空值‘’

df['Date'] = df['Date'].apply(lambda x: int(x) if x != '' else x)#因為時間被改為了浮點數，將時間轉化為整型

df['Date_received'] = df['Date_received'].apply(lambda x: int(x) if x != '' else x)

df.to_csv('/var/tmp/pool_oto/ccf_online_stage1_train2.csv',index = False)

sql程式碼：

LOAD DATA INFILE '/var/tmp/pool_oto/ccf_online_stage1_train2.csv'

INTO TABLE oto.online_train

FIELDS TERMINATED BY ','

ignore 1 lines   /*忽略首行，因為首行為列名，匯入進去會出現Incorrect integer value:的錯誤，因為user_id為字串*/

/*這裡使用使用者變數@，可以讓資料根據我們想要的形式存入資料庫, 同時要保證欄位的順序和要傳入的表格順序一致

否則匯入表後會出現匯入的值和欄位名匹配不上的問題*/

(@User_id,@Merchant_id,@Action, @Coupon_id,@Discount_rate, @Date_received,@Date)

SET

User_id = IF(@User_id= '', NULL,@User_id),

Merchant_id= IF(@Merchant_id= '', NULL,@Merchant_id),

Action= IF(@Action= '', NULL,@Action),

Coupon_id = IF(@Coupon_id= '', NULL,@Coupon_id),

Discount_rate= IF(@Discount_rate= '', NULL,@Discount_rate),

Date_received= IF(@Date_received= '', NULL,@Date_received),

Date= IF(@Date= '', NULL,@Date)

;