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MySQL+PowerShell

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It was interesting to note that the MySQL Connector/NET Developer Guide doesn’t have any instructions for connecting to the MySQL database from Microsoft Powershell. I thought it would be helpful to write a couple demonstrations scripts, especially when a quick search didn’t find a set of easy to follow samples.

The connection process to MySQL with Powershell is easiest with a non-query, so I created a db_connect table into which I could write a row of data:

CREATE TABLE db_connect
( db_connect_id  INT UNSIGNED PRIMARY KEY AUTO_INCREMENT
, version        VARCHAR(10)
, user           VARCHAR(24)
, db_name        VARCHAR(10));

The following insert.ps1 PowerShell script connects to the MySQL database, and inserts one row into the db_connect table:

# Connect to the libaray MySQL.Data.dll
Add-Type -Path 'C:\Program Files (x86)\MySQL\Connector NET 8.0\Assemblies\v4.5.2\MySql.Data.dll'
 
# Create a MySQL Database connection variable that qualifies:
# [Driver]@ConnectionString
# ============================================================
#  You can assign the connection string before using it or
#  while using it, which is what we do below by assigning
#  literal values for the following names:
#   - server=<ip_address> or 127.0.0.1 for localhost
#   - uid=<user_name>
#   - pwd=<password>
#   - database=<database_name>
# ============================================================
$Connection = [MySql.Data.MySqlClient.MySqlConnection]@{ConnectionString='server=127.0.0.1;uid=student;pwd=student;database=studentdb'}
$Connection.Open()
 
# Define a MySQL Command Object for a non-query.
$sql = New-Object MySql.Data.MySqlClient.MySqlCommand
$sql.Connection = $Connection
$sql.CommandText = 'INSERT INTO db_connect (version, user, db_name)(SELECT version(), user(), database())'
$sql.ExecuteNonQuery()
 
# Close the MySQL connection.
$Connection.Close()

The ConnectionString above uses the standard local 127.0.0.1 IP address as the server location. You could just as easily use localhost as the server location if you’re testing on your own machine.

You run the insert.ps1 PowerShell script from the Windows command shell:

powershell .\insert.ps1

After running the insert.ps1 PowerShell script, you can connect to the studentdb database. Then, run the following query:

SELECT version AS "Version"
,      user AS "User"
,      db_name AS "Database"
FROM   db_connect;

It displays:

+---------+-------------------+-----------+
| Version | User              | Database  |
+---------+-------------------+-----------+
| 8.0.21  | student@localhost | studentdb |
+---------+-------------------+-----------+
1 row in set (0.01 sec)

If you’re interested in writing a Connection Prompt dialog for PowerShell, the complete code is in this other blog post of mine. It also provides the instructions to put the code into a reusable PowerShell library. Also, if you’re interested in how to pass option flags and parameters I put that in this new blog post.

As always, I hope this helps those trying to use PowerShell as a scripting tool to insert, update, or delete data.

Written by maclochlainn

April 27th, 2021 at 9:33 pm