比较MySQL和CSV并发现差异 [英] Compare MySQL with CSV and find differences
问题描述
我有一个 CSV
文件,其中包含名为 EAN 的1列和带有 EAN 列的 MySQL
表也是.
I have a CSV
file with 1 column named EAN and a MySQL
Table with a column named EAN too.
这是我要比较两列的操作:
This is what I want to do comparing both columns:
CSV ||| MySQL ||| STATUS
123 123 OK
321 321 OK
444 MISSING IN MySQL
111 MISSING IN CSV
有什么想法如何使用 PHP
实现吗?
Any ideas how to realize with PHP
?
推荐答案
一种方法:
(假设您已经知道如何打开文件并执行查询.)
(Assuming you already know how to open a file and execute a query.)
首先从CSV中读取行,并假定SQL中的数据丢失.
First read rows from your CSV and assume the data is missing in SQL.
while (($row = fgetcsv($file)) !== FALSE) {
$num = $row[0]; // or whatever CSV column the value you want is in
$result[$num] = ['csv' => $num, 'sql' => '', 'status' => 'MISSING IN SQL'];
}
然后从查询中获取行,并相应地填充从CSV创建的数组.
Then fetch rows from your query and fill the array you created from the CSV accordingly.
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$num = $row['EAN']; // or whatever your column is named
if (isset($result[$num])) {
// This has a value from the CSV, so update the array
$result[$num]['sql'] = $num;
$result[$num]['status'] = 'OK';
} else {
// This doesn't have a value from the CSV, so insert a new row
$result[$num] = ['csv' => '', 'sql' => $num, 'status' => 'MISSING IN CSV'];
}
}
您可以更改顺序,然后先处理查询结果.只要您对第二个数据源进行更新/插入逻辑,任何一种顺序都将起作用.
You could change the order of this and process the query results first. Either order will work, just as long as you do the update/insert logic with the second data source.
如果希望合并值按顺序排列,则可以 ksort($ result);
,然后根据需要输出 $ result
.
You can ksort($result);
if you want the merged values to be in order, then output $result
however you need to.
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