How to display column information in MySQL Workbench?
- 1. Go to the Navigation tab and click on the Schema menu where all the previously created databases available. Select your desired database (for ...
- 2. Click on the Tables that show all tables stored in the mysqltestdb database. Select a table whose column information you want to display. Then, ...
- 3. Click the icon (i) shown in the red rectangular box. We should get the screen as follows:
- 4. Finally, click on the " Columns " menu. We can see the column information as like below output.
Full Answer
How to display rows as columns in MySQL?
- If we have not specified any key, it means the column is not indexed. ...
- If the column is specified as a PRI, it means the column is a PRIMARY KEY or one of the fields in a multiple-column PRIMARY KEY.
- If the column is specified as a UNI, it means the column contains a UNIQUE index.
How to show the collation of a column in MySQL?
To show all columns of a table, you use the following steps:
- Login to the MySQL database server.
- Switch to a specific database.
- Use the DESCRIBE statement.
How to get all used values in columns in MySQL?
The ALL operator:
- returns a boolean value as a result
- returns TRUE if ALL of the subquery values meet the condition
- is used with SELECT, WHERE and HAVING statements
How to show tables in MySQL?
When we execute the below statements, we will get the same result:
- mysql> SHOW TABLES FROM mystudentdb;
- OR,
- mysql> SHOW TABLES IN mystudentdb;
How do I display a column in MySQL?
You can list a table's columns with the mysqlshow db_name tbl_name command. The DESCRIBE statement provides information similar to SHOW COLUMNS ....SHOW COLUMNS displays the following values for each table column:Field. The name of the column.Type. The column data type.Collation. ... Null. ... Key. ... Default. ... Extra. ... Privileges.More items...
How do I show all columns in MySQL?
The more flexible way to get a list of columns in a table is to use the MySQL SHOW COLUMNS command. As you can see the result of this SHOW COLUMNS command is the same as the result of the DESC statement. For example, the following statement lists all columns of the payments table in the classicmodels database.
How do I show all columns in SQL?
Lets assume our table name is “Student”.USE MyDB.GO.SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = N'Student'GO.EXEC sp_help 'Student'GO.select * from sys.all_columns where object_id = OBJECT_ID('Student')GO.Oct 17, 2014
How do I get a list of columns in a SQL table?
Information_ Schema You can use the select statement with the Information Schema to retrieve a table's columns from the news object or table. The following query will give the table's column names: SELECT column_name FROM INFORMATION_SCHEMA. COLUMNS.Jul 8, 2019
How do I show all columns in a table?
In a query editor, if you highlight the text of table name (ex dbo. MyTable) and hit ALT + F1 , you'll get a list of column names, type, length, etc. Show activity on this post. Show activity on this post.
How can I see all tables in MySQL?
To get a list of the tables in a MySQL database, use the mysql client tool to connect to the MySQL server and run the SHOW TABLES command. The optional FULL modifier will show the table type as a second output column.Oct 10, 2019
Example
Assume we have database and created a table with name Sales in it, using CREATE statements as follows −
The LIKE clause
Using the LIKE clause, you can specify a pattern to retrieve info about specific columns. Following query retrieves the column names starting with the letter "P".
The WHERE clause
You can use the WHERE clause of the SHOW COLUMNS statements to retrieve information about the columns which match the specified condition.
The FULL clause
Usually, the information provided by the SHOW COLUMNS statements contains field type, can be null or not, key, default values and some extra details. If you use the full clause details like collation, privileges and comments will be added.
What does show columns do in a table?
SHOW COLUMNS displays information about the columns in a given table. It also works for views. SHOW COLUMNS displays information only for those columns for which you have some privilege.
What does the extended keyword do in MySQL?
The optional EXTENDED keyword causes the output to include information about hidden columns that MySQL uses internally and are not accessible by users. The optional FULL keyword causes the output to include the column collation and comments, as well as the privileges you have for each column.
Is a PRI column indexed?
The value is YES if NULL values can be stored in the column, NO if not. If Key is empty, the column either is not indexed or is indexed only as a secondary column in a multiple-column, nonunique index. If Key is PRI, the column is a PRIMARY KEY or is one of the columns in a multiple-column PRIMARY KEY .
