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There are various samples provided for demonstrating Native XML support in Db2. The XML samples come with their own build files, utility files, supporting scripts etc. XQuery samples are all further collected in a separate directory under the parent XML directory.
The following syntax shows sample C# code that uses the .NET driver to make a connection to the database.
In this syntax: First, specify the name of the table that you want to update data. Second, specify a list of column c1, c2, …, cn and the corresponding value v1, v2, … vn that need to be updated. Third, specify the condition to indicate which rows to be updated.
12 Δεκ 2011 · To update two fields you may use an example like this: UPDATE table1 t1 SET (col1, col2) = ( SELECT col3, col4 FROM table2 t2 WHERE t1.col8=t2.col9 ) The optimizer will see that the sub-queries in the SET and the FROM clause are identical and it should merge them in the internal execution plan.
5 Αυγ 2024 · The material covered here provides code examples that can reduce application development time by providing working C# source code examples showing typical database access tasks in ADO.NET, using the DataDirect Connect for .NET DB2 data provider.
UPDATE EMPLOYEE EU SET (EU.SALARY, EU.COMM) = (SELECT AVG(ES.SALARY), AVG(ES.COMM) FROM EMPLOYEE ES WHERE ES.WORKDEPT = EU.WORKDEPT) WHERE EU.EMPNO = '000120' Example 5: In a C program display the rows from the EMPLOYEE table and then, if requested to do so, change the job (JOB) of certain employees to the new job keyed in.
10 Μαΐ 2017 · You can also do it with a traditional UPDATE statement: UPDATE TA SET LOGIN = ( SELECT NEWLOGIN FROM TB WHERE OLDLOGIN = TA.LOGIN ) WHERE EXISTS ( SELECT 1 FROM TB WHERE OLDLOGIN = TA.LOGIN );
