How data is stored in Db2?
Numbers can be stored in numeric columns.
Character strings can be stored in character columns or graphic columns.
Date/time strings can be stored in date/time columns of the corresponding type.
Date/time values can be stored in date/time columns of the same type and in character columns..
How is data stored in Db2?
All data in a Db2 database is presented in tables , which are collections of rows all having the same columns.
A table that holds persistent user data is a base table .
A table that stores data temporarily is a temporary table .
A view is an alternative way of representing data that exists in one or more tables..
How to check data in Db2?
Before you use CHECK DATA to check a LOB or XML column, take the following actions:
- Run CHECK LOB to ensure the validity of the LOB table space
- Run REBUILD INDEX or CHECK INDEX on the index on the auxiliary table to ensure its validity
How to get data from Db2?
You can ask Db2 to list the columns in a particular table and certain information about those columns.
The simplest way to retrieve data is to use the SQL statement SELECT to specify a result table.
You can specify the columns and rows that you want to retrieve..
How to get the data from table in Db2?
The simplest way to retrieve data is to use the SQL statement SELECT to specify a result table.
You can specify the columns and rows that you want to retrieve.
In an application program, you can retrieve a set of rows from a table or a result table that is returned by a stored procedure..
What is CDC for Db2 for Z OS?
You can use Db2 for z/OS CDC Connector to connect to a PowerExchange for Db2 for z/OS change data capture (CDC) environment to retrieve change records for registered Db2 source tables.
PowerExchange captures change records from the Db2 tables and logs the records in PowerExchange Logger for z/OS log files..
What is change data capture in Db2?
Turning on DATA CAPTURE CHANGES for a table introduces a small amount of extra logging.
When this option is set for a table, Db2 logs both the full before and after images of the row for each update..
What is check data in Db2?
CHECK DATA includes checking for XML schema violations and XML structure checking.
This option is ignored when SHRLEVEL CHANGE is specified.
If you run CHECK DATA on a base table with XML columns, the EXCEPTIONS keyword has an effect only if the INCLUDE XML TABLESPACES option is also specified..
- The simplest way to retrieve data is to use the SQL statement SELECT to specify a result table.
You can specify the columns and rows that you want to retrieve.
In an application program, you can retrieve a set of rows from a table or a result table that is returned by a stored procedure. - Use the LOAD utility to load one or more tables of a table space.
If you are loading a large number of rows, use the LOAD utility rather than inserting the rows by using the INSERT statement.
You can load data into tables is by using the INSERT statement.