db2 alter column

,Q4 INTEGER);Year Q1 Q2 Q3 Q4----------- ----------- ----------- ----------- -----------2004 20 30) 15 102005 18 40) 12 27The desired resultYear QUARTER RESULTS----------- ----------- -----------2004 1 202004 2 302004 3 152004 4 102005 1 182005 2 402005 3 122005 4 27 This SQL can be implemented as follows: SELECT s.year, Q.quarter, Q.resultsFrom Salesagg as S, TABLE (VALUES (1, s.q1), (2, S.Q2), (3, S.Q3), (4, S.q4)) As Q (Quarter

Method 1 for modifying a column in a DB2 table as an auto-increment primary key) to change a column in the table to auto-increment, run the following command: Alter table The above command is useful online when you change the attributes of a column in a table. 2) When you m

management problem. Before Version 8, the identity column also encountered some problems, such: How do I obtain the value of the identity column to fill the ri-related table? How can I get the value before insertion? How do I reset or change the value of the identity column? This is only part of the problem. Many companies have developed a m

DB2 auto-increment column test1. To change a column in a table to auto-increment, run the following command:Alter table Alter table The above command is useful online when you change the attributes of a column in a table. 2. When you modify the starting value of an auto-incr

In DB2, you can create an identity column for a column in a table that automatically populates the values, and in some cases (such as after deleting the data, you need to start with the minimum value and not repeat it, you can reset the identity column)Grammar:1 ALTER TABLE

Introduction to DB2 V10.5 column storage Before DB2 V10.5, data is stored in rows in a table. Starting with V10.5, DB2 provides support for column storage. The benefit of row storage in relation to column storage is that it is e

It is very easy to create a table in DB2. But how can I create a table with an auto-incrementing column? The following describes how to create an auto-incrementing table in DB2 for your reference. Create table test (id integer not null generated always as identity (startwith 1, increment by 1, no cache ), Name varchar (20 ))

DB2 column functions are one of our most commonly used functions. They calculate a group of values in the column to obtain a single result value. Let's take a look at the DB2 column functions. DB2

DB2 auto-increment column Import and Export test DB2 auto-increment column test 1 when you want to change a column in the table to auto-increment, run the following command: alter table

The modification method of DB2 columns may not be available to everyone. The following describes the modification and restrictions of DB2 columns in detail. If you are interested in the modification method of DB2 columns, take a look. 1. Modify the lengthAlter table tab_name alter c1 set data type varchar (20)2. Set to

DB2 column-to-row is a common operation. The following describes the steps for column-to-row conversion in DB2. If you are interested in column-to-row conversion in DB2, take a look. The following data is provided: Create table sa

Use the following code in java to query the clob column of db2 (conn. createStatement (ResultSet. TYPE_SCROLL_INSENSITIVE, ResultSet. CONCUR_READ_ONLY )) Use the following code in java to query the clob column of db2 (conn. createStatement (ResultSet. TYPE_SCROLL_INSENSITIVE, ResultSet. CONCUR_READ_ONLY )) Use t

resultsYear quarter results---------------------------------2004 1 202004 2 302004 3 152004 4 102005 1 182005 2 402005 3 122005 4 27 This SQL statement can be implemented: Select S. Year, Q. Quarter, Q. ResultsFrom salesclerk as S,Table (values (1, S. Q1 ),(2, S. q2 ),(3, S. Q3 ),(4, S. Q4 ))As Q (quarter, results );The following describes the execution process:The core is to create a table using the table function. This table is a multi-row table implemented by value. An example of virtual