How to DESCRIBE TABLE in SQL?
- DESCRIBE can be said as a synonym for the command EXPLAIN TABLE. These both statements when executed will provide information about all table columns.
- Therefore, using DESCRIBE TABLE in SQL it will tell you either about the columns present in that specific table or its current values type and also the default values for a table’s stage properties.
What are the basic commands of SQL?
- Create Table,
- Alter Table,
- Inserting data into Table,
- Update Table,
- Delete Records from the Table,
- Dropping Table etc.
How to use order by command in SQL?
SQL ORDER BY Keyword
- ORDER BY. The ORDER BY command is used to sort the result set in ascending or descending order. ...
- ASC. The ASC command is used to sort the data returned in ascending order.
- DESC. The DESC command is used to sort the data returned in descending order.
What is the use of commit command in SQL?
There are four Auto-commit commands that exist in SQL, they are:
- SET AUTOCOMMIT ON – By executing this particular command, the auto-commit status turned to be ON, if it is OFF initially. ...
- SET AUTOCOMMIT OFF – This instruction is just the reverse of the first one. ...
- SET AUTOCOMMIT INT_VALUE – This instruction is used to limit the number of statements, which itself gets auto-committed by the server. ...
How to execute SQL statements in command prompt (CMD)?
sqlcmd - Run Transact-SQL Script Files
- Create a script file. Click Start, point to All Programs, point to Accessories, and then click Notepad. Save the file as myScript.sql in the C drive.
- Run the script file. Open a command prompt window. In the Command Prompt window, type: sqlcmd -S myServer\instanceName -i C:\myScript.sql
- Save the output to a text file. Open a command prompt window. ...
What is DESC function in SQL?
The DESC command is used to sort the data returned in descending order.
How do I Desc a table in SQL Server?
Just select table and press Alt + F1 , it will show all the information about table like Column name, datatype, keys etc.
What is the use of describe table name command?
The DESC is the short form of DESCRIBE command and used to dipslay the information about a table like column names and constraints on column name.
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 do you use DESC?
When sorting your result set in descending order, you use the DESC attribute in your ORDER BY clause. For example: SELECT last_name FROM employees WHERE first_name = 'Sarah' ORDER BY last_name DESC; This SQL Server ORDER BY example would return all records sorted by the last_name field in descending order.
How do you describe a table?
TipsStart by saying what information is shown. ... In the second paragraph give an overview of the most important features of the information.Be selective and choose the key observations and trends. ... Divide your observations into paragraphs about different aspects of the data.More items...
What is DESC command in Oracle?
Syntax. DESC[RIBE] {[schema.] object[@db_link]} Lists the column definitions for the specified table, view or synonym, or the specifications for the specified function or procedure.
How do you describe a table in SQL Developer?
1:215:55SQL DESCRIBE table structure | Oracle SQL fundamentals - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut this command is called as describe command describe table name so guys whenever I say table nameMoreBut this command is called as describe command describe table name so guys whenever I say table name it is always one in the same owner dot table name that's the exact syntax. But if you don't specify
How can I see all tables in SQL?
SQL command to list all tables in Oracle Show all tables owned by the current user: SELECT table_name FROM user_tables; Show all tables in the current database: SELECT table_name FROM dba_tables; Show all tables that are accessible by the current user:
How do you describe a column?
A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member.
What are the commands in DDL?
List of DDL commands: CREATE: This command is used to create the database or its objects (like table, index, function, views, store procedure, and triggers). DROP: This command is used to delete objects from the database. ALTER: This is used to alter the structure of the database.
What is enum in SQL?
An ENUM is a string object with a value chosen from a list of permitted values that are enumerated explicitly in the column specification at table creation time.
How do I display the contents of a table in SQL?
To view table data:In SQL Developer, search for a table as described in "Viewing Tables". ... Select the table that contains the data. ... In the object pane, click the Data subtab. ... (Optional) Click a column name to sort the data by that column.(Optional) Click the SQL subtab to view the SQL statement that defines the table.
What does DESC table_name do?
The SQL DESCRIBE TABLE query will make us to know about the organization of table that consists of name of table column with data type values such as VARCHAR, CHAR, INT, FLOAT, TIME, DATE, NUMBER or any XML type, used for the respective fields in the table, also it displays column having NULL or NOT NULL database ...
How do you get DDL of a table in SQL Server?
To generate the table DDL via query, you can use show create command. SHOW CREATE TABLE yourTableName; The above syntax is MySQL specific. Suppose, we have a table with the name 'DDLOfTableStudent'.
How can I see the structure of a table in SQL?
To show the table structure with all its column's attributes: name, datatype, primary key, default value, etc.In SQL Server, use sp_help function:In MySQL and Oracle, you can use DESCRIBE :In PostgreSQL, here is the go-to statement:In SQLite, it's as simple as this:
How to DESCRIBE TABLE in SQL?
DESCRIBE can be said as a synonym for the command EXPLAIN TABLE. These both statements when executed will provide information about all table columns.
What is a SQL statement that tells something about a specific table in the database?
SQL DESCRIBE TABLE is a SQL statement that is accountable for telling something about a specific table in the database. If we want to show the structure of a database table or tables in the server then, we will use the SQL command DESCRIBE or other keyword DESC which is identical to DESCRIBE one. For getting information about the table present in the database and find the attributes related to it, we will use either DESCRIBE or DESC where both of them are Case Insensitive and produces the similar output. We implement the DESCRIBE TABLE statement for getting the info about the name of the column, data type of the column, NULL or NOT NULL attributes of column and table with database size accuracy along with If NUMERIC type scale.
What is a SQL description table?
The SQL DESCRIBE TABLE query will make us to know about the organization of table that consists of name of table column with data type values such as VARCHAR, CHAR, INT, FLOAT, TIME, DATE, NUMBER or any XML type, used for the respective fields in the table, also it displays column having NULL or NOT NULL database objects that says if the column do include null values or not.
Why is SQL describe useful?
Thus, the SQL DESCRIBE TABLE is beneficial for fetching out details about the current table present in the database.
What are the fields in a customer table?
Let us take the table Customer with fields: CustomerID, CustomerName, Credit_Limit and City having their respective data types and other attributes.
What is the most commonly used SQL statement?
SELECT is probably the most commonly-used SQL statement. You'll use it pretty much every time you query data with SQL. It allows you to define what data you want your query to return.
What is a view in SQL?
CREATE VIEW creates a virtual table based on the result set of an SQL statement. A view is like a regular table (and can be queried like one), but it is not saved as a permanent table in the database.
What does "create table" mean?
CREATE TABLE creates a new table inside a database. The terms int and varchar (255) in this example specify the datatypes of the columns we're creating.
What is the purpose of Create?
CREATE can be used to set up a database, table, index or view.
Example
Assume we have created a table with name Sales in MySQL database using CREATE statement as follows −
Info about specific column
By default, this statement provides information about all the columns in the specified table you can retrieve information about a particular table by specifying the name of the column −
DESC
You can also retrieve the column information using the DESC statement instead of DESCRIBE.
What is SQL command?
SQL commands are the instructions used to communicate with a database to perform tasks, functions, and queries with data. SQL commands can be used to search the database and to do other functions like creating tables, adding data to tables, modifying data, and dropping tables. Here is a list of basic SQL commands (sometimes called clauses) ...
What is the select part of a query?
The SELECT part of a query determines which columns of the data to show in the results. There are also options you can apply to show data that is not a table column.
What is sort by in SQL?
ORDER BY gives us a way to sort the result set by one or more of the items in the SELECT section. Here is an SQL sorting the students by FullName in descending order. The default sort order is ascending ( ASC) but to sort in the opposite order (descending) you use DESC.
What is a group by?
GROUP BY allows you to combine rows and aggregate data.
What does "create table" mean?
CREATE TABLE does just what it sounds like: it creates a table in the database. You can specify the name of the table and the columns that should be in the table.
When to use like in SQL?
LIKE is used in a WHERE or HAVING (as part of the GROUP BY) to limit the selected rows to the items when a column has a certain pattern of characters contained in it. This SQL will select students that have FullName starting with “Monique” or ending with “Greene”.
Can you place "not before like" in SQL?
You can place NOT before LIKE to exclude the rows with the string pattern instead of selecting them. This SQL excludes records that contain “cer Pau” and “Ted” in the FullName column.
What is sp_columns stored procedure?
SQL Server can also use sp_columns stored procedure to show the structure of a SQL Server table. It is the simplest way to display the columns and related information of a selected table. We can use it as below syntax: EXEC sp_columns mytable; EXEC sp_columns mytable;
What is information_schema.columns?
The INFORMATION_SCHEMA.COLUMNS statement produces information about all columns for all tables in a current database. By default, this information will be shown for each table in the database.
How to display properties in SQL Server?
Step 2: Select the table for which you want to display the properties.
What is the description command?
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. For more information, see the SET command.
How to describe a table?
The description for tables, views, types and synonyms contains the following information: 1 each column's name 2 whether or not null values are allowed (NULL or NOT NULL) for each column 3 datatype of columns, for example, CHAR, DATE, LONG, LONGRAW, NUMBER, RAW, ROWID, VARCHAR2 (VARCHAR), or XMLType 4 precision of columns (and scale, if any, for a numeric column)
What does SQL Plus represent?
Represents the schema where the object or permission to describe the object resides . If you omit schema and the object is not a public synonym, SQL*Plus assumes you own object.
Syntax of SQL Describe Table
How to Describe Table in Sql?
- DESCRIBE can be said as a synonym for the command EXPLAIN TABLE. These both statements when executed will provide information about all table columns.
- Therefore, using DESCRIBE TABLE in SQL it will tell you either about the columns present in that specific table or its current values type and also the default values for a table’s stage properties.
- DESCRIBE can be said as a synonym for the command EXPLAIN TABLE. These both statements when executed will provide information about all table columns.
- Therefore, using DESCRIBE TABLE in SQL it will tell you either about the columns present in that specific table or its current values type and also the default values for a table’s stage properties.
- When we execute DESCRIBE TABLE command in our database we will be able to view the structure of the table in a describe tab but not on the console tab of the system software.
- The SQL DESCRIBE TABLE query will make us to know about the organization of table that consists of name of table column with data type values such as VARCHAR, CHAR, INT, FLOAT, TIME, DATE, NUMBER o...
Conclusion
- The DESCRIBE query in SQL is implemented to display the definitions of a list of columns for a specified database table. SQL DESCRIBE Table command should be executed on only our system software not it any editor because it won’t run there. We need to run this DESCRIBE query on the database installed on our own system server.
Recommended Articles
- This is a guide to SQL DESCRIBE TABLE. Here we discuss the introduction, how to DESCRIBE TABLE in SQL? and examples respectively. You may also have a look at the following articles to learn more – 1. SQL DML Commands 2. What is SQL 3. SQL with Clause 4. SQL TRUNCATE()