在数据库中以1分钟为单位插入超过7000000条记录（计算超高速查询）

Question

我有像这样的.csv文件数据

Date,Name,Call Type,Number,Duration,Address,PostalCode,City,State,Country,Latitude,Longitude
"Sep-18-2013 01:53:45 PM","Unknown","outgoing call",'123456',"0 Secs","null","null","null","null","null",0.0,0.0,,,
"Sep-18-2013 01:54:14 PM","Unknown","outgoing call",'1234567890',"0 Secs","null","null","null","null","null",0.0,0.0,,,
"Sep-18-2013 01:54:37 PM","Unknown","outgoing call",'14772580369',"1 Secs","null","null","null","null","null",0.0,0.0,,,

我正在使用以下代码将数据插入数据库

$sql = "LOAD DATA INFILE `detection.csv`
              INTO TABLE `calldetections`
              FIELDS TERMINATED BY '".@mysql_escape_string(",").
             "` OPTIONALLY ENCLOSED BY `".@mysql_escape_string("\"").
             "` OPTIONALLY ENCLOSED BY `".@mysql_escape_string("\'").
             "` ESCAPED BY `".@mysql_escape_string("\\").
              "` LINES TERMINATED BY `".",,,\\r\\n".
             "`IGNORE 1 LINES `"

             ."(`date`,`name`,`type`,`number`,`duration`,`addr`,`pin`,`city`,`state`,`country`,`lat`,`log`)";
      $res = @mysql_query($con,$sql);

但没有插入;错误在哪里？

Answer 1

如果您在执行之前执行echo($sql);，则会发现您的查询语法不正确，原因如下：

文件名应该用引号括起来，而不是反引号，因为它是字符串文字而不是标识符。
完全无需致电mysql_escape_string()在FIELDS TERMINATED BY以及ENCLOSED BY和ESCAPED BY条款中指定分隔符。
你过度使用反叛。事实上，在你的情况下，由于没有使用保留字，你就抛弃了它们。它们只会增加混乱。
在CSV文件的第一行末尾，您必须 ,,,，因为您将它们用作行分隔符的一部分。如果你不这样做，你不仅会跳过第一行，还会跳过包含数据的第二行。
您不能多次使用ENCLOSED BY子句。您必须以不同的方式处理Number字段。
查看您的示例行恕我直言，您不需要ESCAPED BY。但如果您觉得需要，可以像ESCAPED BY '\\'一样使用它。

这就是说语法正确的陈述可能看起来像这样

LOAD DATA INFILE 'detection.csv'
INTO TABLE calldetections
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"' 
LINES TERMINATED BY ',,,\r\n'
IGNORE 1 LINES 
(date, name, type, number, duration, addr, pin, city, state, country, lat, log)

现在恕我直言，你需要在加载它们时转换很多字段：

如果您的表中的date属于datetime数据类型，则需要进行转换，否则您将收到错误

日期时间值不正确：'Sep-18-2013 01:53:45 PM'列'日期'在行
您必须处理Number字段
您很可能希望将"null"字符串文字更改为NULL列的实际addr, pin, city, state, country
如果持续时间总是以秒为单位，那么您可以提取秒的整数值并将其存储在表格中，以便以后能够轻松汇总持续时间值。

据说这个陈述的有用版本看起来应该是这样的

LOAD DATA INFILE 'detection.csv'
INTO TABLE calldetections
FIELDS TERMINATED BY ','
OPTIONALLY ENCLOSED BY '"' 
LINES TERMINATED BY ',,,\r\n'
IGNORE 1 LINES 
(@date, name, type, @number, @duration, @addr, @pin, @city, @state, @country, lat, log)
SET date = STR_TO_DATE(@date, '%b-%d-%Y %h:%i:%s %p'),
    number = TRIM(BOTH '\'' FROM @number),
    duration = 1 * TRIM(TRAILING 'Secs' FROM @duration),
    addr = NULLIF(@addr, 'null'),
    pin  = NULLIF(@pin, 'null'),
    city = NULLIF(@city, 'null'),
    state = NULLIF(@state, 'null'),
    country = NULLIF(@country, 'null')

以下是在我的机器上执行查询的结果

mysql> LOAD DATA INFILE '/tmp/detection.csv'
    -> INTO TABLE calldetections
    -> FIELDS TERMINATED BY ','
    -> OPTIONALLY ENCLOSED BY '"' 
    -> LINES TERMINATED BY ',,,\n'
    -> IGNORE 1 LINES 
    -> (@date, name, type, @number, @duration, @addr, @pin, @city, @state, @country, lat, log)
    -> SET date = STR_TO_DATE(@date, '%b-%d-%Y %h:%i:%s %p'),
    ->     number = TRIM(BOTH '\'' FROM @number),
    ->     duration = 1 * TRIM(TRAILING 'Secs' FROM @duration),
    ->     addr = NULLIF(@addr, 'null'),
    ->     pin  = NULLIF(@pin, 'null'),
    ->     city = NULLIF(@city, 'null'),
    ->     state = NULLIF(@state, 'null'),
    ->     country = NULLIF(@country, 'null');
Query OK, 3 rows affected (0.00 sec)
Records: 3  Deleted: 0  Skipped: 0  Warnings: 0

mysql> select * from calldetections;
+---------------------+---------+---------------+-------------+----------+------+------+------+-------+---------+------+------+
| date                | name    | type          | number      | duration | addr | pin  | city | state | country | lat  | log  |
+---------------------+---------+---------------+-------------+----------+------+------+------+-------+---------+------+------+
| 2013-09-18 13:53:45 | Unknown | outgoing call | 123456      |        0 | NULL | NULL | NULL | NULL  | NULL    | 0.0  | 0.0  |
| 2013-09-18 13:54:14 | Unknown | outgoing call | 1234567890  |        0 | NULL | NULL | NULL | NULL  | NULL    | 0.0  | 0.0  |
| 2013-09-18 13:54:37 | Unknown | outgoing call | 14772580369 |        1 | NULL | NULL | NULL | NULL  | NULL    | 0.0  | 0.0  |
+---------------------+---------+---------------+-------------+----------+------+------+------+-------+---------+------+------+
3 rows in set (0.00 sec)

最后在php中将查询字符串分配给$sql变量应该看起来像这样

$sql = "LOAD DATA INFILE 'detection.csv'
        INTO TABLE calldetections
        FIELDS TERMINATED BY ','
        OPTIONALLY ENCLOSED BY '\"' 
        LINES TERMINATED BY ',,,\\r\\n'
        IGNORE 1 LINES 
        (@date, name, type, @number, @duration, @addr, @pin, @city, @state, @country, lat, log)
        SET date = STR_TO_DATE(@date, '%b-%d-%Y %h:%i:%s %p'),
            number = TRIM(BOTH '\'' FROM @number),
            duration = 1 * TRIM(TRAILING 'Secs' FROM @duration),
            addr = NULLIF(@addr, 'null'),
            pin  = NULLIF(@pin, 'null'),
            city = NULLIF(@city, 'null'),
            state = NULLIF(@state, 'null'),
            country = NULLIF(@country, 'null') ";

Answer 2

在数据库中以1分钟为单位插入超过7000000条记录（计算超高速查询）

    mysqli_query($cons, '
    LOAD DATA LOCAL INFILE "'.$file.'"
    INTO TABLE tablename
    FIELDS TERMINATED by \',\'
    LINES TERMINATED BY \'\n\'
    IGNORE 1 LINES
    (isbn10,isbn13,price,discount,free_stock,report,report_date)
     SET RRP = IF(discount = 0.00,price-price * 45/100,IF(discount = 0.01,price,IF(discount != 0.00,price-price * discount/100,@RRP))),
         RRP_nl = RRP * 1.44 + 8,
         RRP_bl = RRP * 1.44 + 8,
         ID = NULL
    ')or die(mysqli_error());
    $affected = (int) (mysqli_affected_rows($cons))-1; 
    $log->lwrite('Inventory.CSV to database:'. $affected.' record inserted successfully.');

RRP和RRP_nl以及RRP_bl不在csv中，但是在插入之后我们计算出来。

PHP - 使用LOAD DATA INFILE将CSV文件导入mysql数据库

2 个答案:

在数据库中以1分钟为单位插入超过7000000条记录（计算超高速查询）