Desc / Describe Table In Current Project
Describe Table In Current Project
Displays the schema of a specific table including column data types.
desc <table_name>; desc <table_name>; #!/bin/bash
# Describe Table In Current Project
desc {{table_name}}; import subprocess
# Describe Table In Current Project
# Make sure to replace <placeholders> with actual values
def run_command():
cmd = [
"desc",
"<table_name>;"
]
try:
print(f"Executing: {' '.join(cmd)}")
subprocess.run(cmd, check=True)
except subprocess.CalledProcessError as e:
print(f"Error: {e}")
except FileNotFoundError:
print("Error: desc not found. Please install it first.")
if __name__ == "__main__":
run_command() When To Use
When validating table structure before data manipulation tasks.
Pro Tip
Use the `extended` flag with DESC for additional details on indexed columns, though this may increase latency.
Command Builder
Tune the command before you copy it
desc <table_name>; Anatomy of Output
Understanding the result
+--------------+-----------+------+-----+---------+-------+ Row Separator Indicates the start of the table schema.
| Field | Type | Null | Key | Default | Extra | Header Row Definitions of column attributes.
+--------------+-----------+------+-----+---------+-------+ Separator Partition between header and data.
| id | int(11) | NO | PRI | NULL | | Column Entry `id` is a primary key, cannot be NULL.
| username | varchar(50) | YES | | NULL | | Column Entry `username` can be NULL, holds string data.
+--------------+-----------+------+-----+---------+-------+ Row Separator End of the schema.
Troubleshooting
Common pitfalls
ERROR 1146 (42S02): Table 'xyz.table_name' doesn't exist
Solution: Confirm the table name and check the database context.
ERROR 1064 (42000): You have an error in your SQL syntax;
Solution: Ensure proper syntax, avoid using reserved words as table names.
ERROR 1045 (28000): Access denied for user 'user'@'localhost' (using password: YES)
Solution: Check user permissions for the database.
Command Breakdown
What each part is doing
-
desc - Base Command
- The executable that performs this operation. Here it runs Desc before the shell applies any redirect operators.
-
<table_name> - table name
- The value supplied for table name.
Alternative Approaches
Comparable commands in other tools
Alternative data processing tools for the same job.
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