To list all fields (columns) from a table in MySQL, you can use one of the following methods:
1. Using DESCRIBE
or EXPLAIN
Statement
DESCRIBE table_name;
or
EXPLAIN table_name;
This will provide details about each column in the table, including its name, data type, whether it allows NULL
, and other information.
2. Using SHOW COLUMNS
Statement
SHOW COLUMNS FROM table_name;
This will return the column names along with their types, nullability, key information, default values, and extra information.
3. Querying the Information Schema
The INFORMATION_SCHEMA.COLUMNS
table contains metadata about all columns in the database.
To get just the column names for a specific table:
SELECT COLUMN_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'table_name'
AND TABLE_SCHEMA = 'database_name';
Replace table_name
with the name of your table and database_name
with the name of your database.
Choosing the Right Method
- For a quick overview, use
DESCRIBE
orSHOW COLUMNS
. - For more flexibility (e.g., filtering by schema or table name), use the
INFORMATION_SCHEMA.COLUMNS
query.
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