In DB2, enter on db2 command prompt. Also the following command works: describe SELECT * FROM table_name; Where the select statement can be replaced with any other select statement, which is quite useful for complex inserts with select for example.
How can you see all indexes defined for a table in SQL?
To list all indexes of a specific table:
- SHOW INDEX FROM table_name FROM db_name;
- SHOW INDEX FROM db_name. table_name;
- SELECT DISTINCT TABLE_NAME, INDEX_NAME FROM INFORMATION_SCHEMA. STATISTICS WHERE TABLE_SCHEMA = `schema_name`;
- SELECT DISTINCT TABLE_NAME, INDEX_NAME FROM INFORMATION_SCHEMA. STATISTICS;
How can I see the table structure in IBM Data Studio?
In the left pane of the screen that is displayed, select the Data Source Explorer tab and expand the Database Connections node. Select the appropriate database to expand its objects tree. Expand the Schemas node and the schema name where the table is located. Expand the Tables node and right click on the desired table.
How do you describe a view in DB2?
To define a view, you use the CREATE VIEW statement and assign a name (up to 128 characters in length) to the view. Specifying the view in other SQL statements is effectively like running an SQL SELECT statement. At any time, the view consists of the rows that would result from the SELECT statement that it contains.
What are tablespaces in Db2?
A DB2® table space is a set of volumes on disks that hold the data sets in which tables are actually stored. Every table is stored in table space. A table space consists of a number of VSAM linear data sets (LDSs). You can also explicitly define table spaces by issuing CREATE TABLESPACE statements.
What is an index in DB2 and types of indexes?
Index is a set of pointers, which can refer to rows in a table, blocks in MDC or ITC tables, XML data in an XML storage object that are logically ordered by the values of one or more keys. It is created on DB2 table columns to speed up the data access for the queries, and to cluster and partition the data efficiently.
How do you show the description of a table?
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.
What is indexindex in DB2?
Index is a set of pointers, which can refer to rows in a table, blocks in MDC or ITC tables, XML data in an XML storage object that are logically ordered by the values of one or more keys. It is created on DB2 table columns to speed up the data access for the queries, and to cluster and partition the data efficiently.
What is the use of describe table in DB2?
DB2 provides the different types of commands to the user, the DB2 describe table is one of the commands that is provided by the DB2. Basically describe table command is used to fetch all details structure of a created table that
How to view DB2 table structure in tabular format?
Open db2 command window, connect to db2 with following command. Once you connected successfully, issue the following command to view the table structure. The above command will display db2 table structure in tabular format. Note: Tested on DB2 Client 9.7.11
How to see all indexes in a table?
To see all indexes :- select * from user_objects where object_type=’INDEX’ To see index and its columns on table : select * from USER_IND_COLUMNS where TABLE_NAME=’my_table’ Share Improve this answer Follow edited Feb 5 ’16 at 12:14 Abhinav Singh Maurya 3,29388 gold badges3131 silver badges5050 bronze badges
