mysql - MYSQL - 我将如何导出仅指定某些字段的表？

Question

如何导出仅指定某些字段的表？

我正在使用 mysql 5.0 - 使用 sql 命令或 mysqldump。

我的表是 X，我要导出的字段是 A,B,C

Answer 1

SELECT A,B,C
FROM X
INTO OUTFILE 'file name';

您需要 FILE 权限才能执行此操作，并且它不会覆盖文件。

INTO OUTFILE它也有很多选项，例如FIELDS ENCLOSED BY,FIELDS ESCAPED BY等...您可能想在手册中查找。

要生成 CSV 文件，您可以执行以下操作：

SELECT A,B,C
INTO OUTFILE '/tmp/result.txt'
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY '\n'
FROM X;

要从文件中重新加载数据，请使用该LOAD DATA INFILE命令与您用于转储它的选项相同。对于上面的 CSV 格式，那将是

LOAD DATA INFILE '/tmp/result.txt'
INTO TABLE X
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
LINES TERMINATED BY '\n';

Answer 2

If you are using phpMyAdmin,

Run the query

SELECT A,B,C FROM X

and there is an export option in the bottom of the result.

Answer 3

OUTFILE不会为您生成 SQL 转储，也mysqldump不能对列的子集进行操作。但是您可以create table temp_weeeee select ....导出并删除它。

Answer 4

外壳命令

echo 'select field from db.table;' | mysql -u user -p password > output.txt

Answer 5

尝试：

SELECT col1, col2
  INTO OUTFILE '/filepath/export.txt'
    FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"'
    LINES TERMINATED BY '\n'
FROM table;