Learn how to query the last login date of DB2 users on Windows using SQL and PowerShell commands. This article also provides some tips and FAQs on DB2 user management.
DB2 is a relational database management system (RDBMS) that runs on various platforms, including Windows. DB2 users are accounts that can access the database and perform various operations, such as querying, updating, or deleting data. As a DB2 administrator, you may want to monitor the activity of your DB2 users and find out when they last logged in to the database. This can help you identify inactive or unused accounts, enforce security policies, or optimize database performance.
In this article, you will learn how to query the last login date of DB2 users on Windows using SQL and PowerShell commands. You will also find some tips and FAQs on DB2 user management.
Table of Contents
How to Query the Last Login Date of DB2 Users on Windows
Using SQL
One way to query the last login date of DB2 users on Windows is to use SQL statements. DB2 stores information about its users and their access history in system catalog tables, such as SYSCAT.USERAUTH and SYSCAT.TABLES. You can join these tables and use the LASTUSED column to get the last date when a user accessed a table in the database. For example, the following SQL statement returns the user name and the last login date for each user who accessed any table in the database:
SELECT UA.GRANTEE AS USER_NAME, MAX(T.LASTUSED) AS LAST_LOGIN_DATE
FROM SYSCAT.USERAUTH UA
JOIN SYSCAT.TABLES T ON UA.GRANTEE = T.TABSCHEMA
GROUP BY UA.GRANTEE
ORDER BY LAST_LOGIN_DATE DESC;
The output of this SQL statement may look something like this:
| USER_NAME | LAST_LOGIN_DATE |
|---|---|
| ADMIN | 2023-12-12 |
| USER1 | 2023-11-30 |
| USER2 | 2023-10-15 |
| USER3 | NULL |
Note that the LASTUSED column may contain NULL values if the user has never accessed any table in the database or if the database was recently created or restored. Also, the LASTUSED column only records the date, not the time, of the last access.
Using PowerShell
Another way to query the last login date of DB2 users on Windows is to use PowerShell commands. PowerShell is a scripting language and a command-line shell that can interact with various Windows components, including DB2. You can use the Get-LocalUser cmdlet to get information about the local users on your Windows system, including their last login date. For example, the following PowerShell command returns the user name and the last login date for each local user on your Windows system:
Get-LocalUser | Select Name, LastLogon
The output of this PowerShell command may look something like this:
| Name | LastLogon |
|---|---|
| ADMIN | 2023-12-12 13:54:59 |
| USER1 | 2023-11-30 10:23:45 |
| USER2 | 2023-10-15 08:15:32 |
| USER3 | 2023-09-01 12:34:56 |
Note that the LastLogon property may contain NULL values if the user has never logged in to the Windows system or if the user account was recently created. Also, the LastLogon property records both the date and the time of the last login.
FAQs on DB2 User Management
Question: How to Create a DB2 User on Windows
Answer: To create a DB2 user on Windows, you need to create a local user account on your Windows system and then grant the appropriate privileges to the user on the DB2 database. You can use the New-LocalUser cmdlet in PowerShell to create a local user account. For example, the following PowerShell command creates a local user account with the name USER4 and the password P@ssw0rd:
New-LocalUser -Name USER4 -Password (ConvertTo-SecureString -AsPlainText "P@ssw0rd" -Force)
You can use the db2 command-line processor in DB2 to grant privileges to the user on the DB2 database. For example, the following DB2 command grants the CONNECT privilege to the user USER4 on the database SAMPLE:
db2 GRANT CONNECT ON DATABASE TO USER USER4
Question: How to Delete a DB2 User on Windows
Answer: To delete a DB2 user on Windows, you need to revoke the privileges of the user on the DB2 database and then delete the local user account on your Windows system. You can use the db2 command-line processor in DB2 to revoke privileges from the user on the DB2 database. For example, the following DB2 command revokes the CONNECT privilege from the user USER4 on the database SAMPLE:
db2 REVOKE CONNECT ON DATABASE FROM USER USER4
You can use the Remove-LocalUser cmdlet in PowerShell to delete the local user account. For example, the following PowerShell command deletes the local user account with the name USER4:
Remove-LocalUser -Name USER4
Question: How to List All DB2 Users on Windows
Answer: To list all DB2 users on Windows, you can use either SQL or PowerShell commands. You can use the SYSCAT.USERAUTH system catalog table in DB2 to list all the users who have any privilege on the DB2 database. For example, the following SQL statement returns the user name and the privilege type for each user who has any privilege on the database SAMPLE:
SELECT GRANTEE AS USER_NAME, GRANTEETYPE AS PRIVILEGE_TYPE
FROM SYSCAT.USERAUTH
WHERE DBNAME = 'SAMPLE';
The output of this SQL statement may look something like this:
| USER_NAME | PRIVILEGE_TYPE |
|---|---|
| ADMIN | DBADM |
| USER1 | CONNECT |
| USER2 | CONNECT |
| USER3 | CONNECT |
You can use the Get-LocalUser cmdlet in PowerShell to list all the local users on your Windows system. For example, the following PowerShell command returns the user name and the enabled status for each local user on your Windows system:
Get-LocalUser | Select Name, Enabled
The output of this PowerShell command may look something like this:
| Name | Enabled |
|---|---|
| ADMIN | True |
| USER1 | True |
| USER2 | True |
| USER3 | False |
Summary
In this article, you learned how to query the last login date of DB2 users on Windows using SQL and PowerShell commands. You also learned some tips and FAQs on DB2 user management. You can use these techniques to monitor and manage your DB2 users and optimize your database security and performance.
Disclaimer: This article is for informational purposes only and does not constitute professional advice. The author and the publisher are not liable for any damages or losses that may result from the use of the information or techniques in this article. Always consult a qualified DB2 expert before making any changes to your DB2 database or user accounts.