如何将变量传递给mysql脚本？

I know that with mysql you can write SQL statements into a .sql file and run the file from the mysql command line like this:

我知道使用mysql你可以将SQL语句写入.sql文件并从mysql命令行运行该文件，如下所示：

mysql> source script.sql

How do I pass a variable to the script? For example, if I want to run a script that retrieves all the employees in a department, I want to be able to pass in the number of the department as a variable.

如何将变量传递给脚本？例如，如果我想运行一个检索部门中所有员工的脚本，我希望能够将部门的编号作为变量传递。

I am not trying to run queries through a shell script. There are simple queries I run from the mysql command line. I'm tired of retyping them all the time, and writing a shell script for them would be overkill.

我不是试图通过shell脚本运行查询。我从mysql命令行运行简单的查询。我已经厌倦了一直重新输入它们，为它们编写一个shell脚本会有点过分。

3 个解决方案

#1

Like this:

喜欢这个：

set @department := 'Engineering';

Then, reference @department wherever you need to in script.sql:

然后，在script.sql中的任何地方引用@department：

update employee set salary = salary + 10000 where department = @department;

#2

    #!/bin/bash

    #verify the passed params
    echo 1 cmd arg : $1
    echo 2 cmd arg : $2

    export db=$1
    export tbl=$2

    #set the params ... Note the quotes ( needed for non-numeric values )
    mysql -uroot -pMySecretPaassword \
    -e "set @db='${db}';set @tbl='${tbl}';source run.sql ;" ;

    #usage: bash run.sh isg_pub_en MetaEntity
    #
    #eof file: run.sh

    --file:run.sql

    SET @query = CONCAT('Select * FROM ', @db , '.' , @tbl ) ;
    SELECT 'RUNNING THE FOLLOWING query : ' , @query ;
    PREPARE stmt FROM @query;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;

    --eof file: run.sql

you can re-use the whole concept from from the following project

您可以从以下项目中重用整个概念

#3

-5

you really should be looking at a more appropriate way of doing this. i'm going to guess that you're trying to run mysql queries via a shell script. you should instead be using something like PERL or PHP.

你真的应该考虑一种更合适的方式。我猜你正试图通过shell脚本运行mysql查询。你应该使用像PERL或PHP这样的东西。

#1