Question: How do you describe a column in a table in SQL?

SQL Server: sp_help table_name (or sp_columns table_name for only columns) Oracle DB2: desc table_name or describe table_name. MySQL: describe table_name (or show columns from table_name for only columns)

How can I get column details of a table in SQL?

Using the Information Schema

  1. SELECT TABLE_NAME FROM INFORMATION_SCHEMA. TABLES.
  2. SELECT TABLE_NAME, COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS.
  3. SELECT COLUMN_NAME FROM INFORMATION_SCHEMA. COLUMNS WHERE TABLE_NAME = ‘Album’
  4. IF EXISTS( SELECT * FROM INFORMATION_SCHEMA. …
  5. IF EXISTS( SELECT * FROM INFORMATION_SCHEMA.

What is the describe command in SQL?

The DESCRIBE command enables you to describe objects recursively to the depth level set in the SET DESCRIBE command. You can also display the line number and indentation of the attribute or column name when an object contains multiple object types. … the type of PL/SQL object (function or procedure)

How do I view a column description in SQL Server?

About sys. columns

  1. Name: The name of the column. …
  2. Object_id: object_id is unique identifier for the table in which the column exists. …
  3. Column_id: ID of the column. …
  4. user_type_id: System code for column data type.
  5. max_length: Maximum length (in bytes) of the column.
  6. is_nullable: 1 if column is nullable.
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How can I get table description in SQL Server?

Just select table and press Alt + F1 , it will show all the information about table like Column name, datatype, keys etc.

How do you describe a table in a database?

So desc or describe command shows the structure of table which include name of the column, data-type of column and the nullability which means, that column can contain null values or not. All of these features of table are described at the time of Creation of table.

How do I find the description of a table in SQL?

SQL Server: sp_help table_name (or sp_columns table_name for only columns) Oracle DB2: desc table_name or describe table_name. MySQL: describe table_name (or show columns from table_name for only columns)

What is describe table?

Describes either the columns in a table or the current values, as well as the default values, for the stage properties for a table. DESCRIBE can be abbreviated to DESC. ALTER TABLE , CREATE TABLE , SHOW TABLES.

How do I get only column names in SQL?

The following query will give the table’s column names:

  1. SELECT column_name FROM INFORMATION_SCHEMA. COLUMNS.
  2. WHERE TABLE_NAME = ‘News’

How do you comment in SQL?

Comments Within SQL Statements

  1. Begin the comment with a slash and an asterisk (/*). Proceed with the text of the comment. This text can span multiple lines. …
  2. Begin the comment with — (two hyphens). Proceed with the text of the comment. This text cannot extend to a new line.
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