SHOW COLUMNS
Description
Returns the list of columns in a table. If the table does not exist, an exception is thrown.
Syntax
SHOW COLUMNS table_identifier [ database ]
Parameters
-
table_identifier
Specifies the table name of an existing table. The table may be optionally qualified with a database name.
Syntax:
{ IN | FROM } [ database_name . ] table_nameNote: Keywords
INandFROMare interchangeable. -
database
Specifies an optional database name. The table is resolved from this database when it is specified. When this parameter is specified then table name should not be qualified with a different database name.
Syntax:
{ IN | FROM } database_nameNote: Keywords
INandFROMare interchangeable.
Examples
-- Create `customer` table in `salesdb` database;
USE salesdb;
CREATE TABLE customer(
cust_cd INT,
name VARCHAR(100),
cust_addr STRING);
-- List the columns of `customer` table in current database.
SHOW COLUMNS IN customer;
+---------+
| col_name|
+---------+
| cust_cd|
| name|
|cust_addr|
+---------+
-- List the columns of `customer` table in `salesdb` database.
SHOW COLUMNS IN salesdb.customer;
+---------+
| col_name|
+---------+
| cust_cd|
| name|
|cust_addr|
+---------+
-- List the columns of `customer` table in `salesdb` database
SHOW COLUMNS IN customer IN salesdb;
+---------+
| col_name|
+---------+
| cust_cd|
| name|
|cust_addr|
+---------+