DB2 Command Line Essentials Guide | Generated by AI
DB2 provides several command-line interfaces and utilities for database administration and development. Here’s an overview of the main command options:
Main Command Interfaces
DB2 Command Line Processor (CLP) - The primary interface for executing DB2 commands and SQL statements. You can invoke it in three modes:
- Interactive mode: Type
db2to enter an interactive session where you can execute commands directly - Command mode: Execute single commands like
db2 "SELECT * FROM table" - Batch mode: Run SQL scripts with
db2 -tf script.sql
DB2 Command Window (Windows) - A GUI wrapper around the CLP that provides a windowed interface for executing commands.
Common DB2 Commands
Some frequently used commands include:
CONNECT TO database- Connect to a databaseLIST TABLES- Display all tables in the current schemaDESCRIBE TABLE tablename- Show table structureLIST APPLICATIONS- Show active connectionsTERMINATE- End the database connectionQUIESCE DATABASE- Restrict database access
CLP Options
The DB2 CLP supports various options when invoked:
-a- Display input commands as they execute-c- Auto-commit after each statement-e- Display error messages with SQLCODE and SQLSTATE-f filename- Read commands from a file-l logfile- Log output to a file-s- Stop execution on error-t- Use semicolon as statement terminator-v- Echo input text to output-x- Suppress column headings
Would you like me to explain any specific DB2 command area in more detail?