In most tables it is enough to have a stored procedure that performs Update Else Insert logic for data managment. However, in some cases we do not want to destroy the old data with an update statement. Instead we want to maintain history up to a certain number of versions. This article presents a method for doing so.
2001-08-27
3,331 reads
A great deal of data in any RDBMS is hierarchial. This article presents a technique for aggregating this data.
2001-08-22
3,084 reads
Sometimes it is necessary to save binary data such as zip files, pictures or office documents into the database. This article looks at a way of using Java to perform this task.
2001-08-07
8,828 reads
The following stored procedure will demonstrate the use of cursor metadata. Using cursor metadata we can get information about an SQL statement and use that information to dynamically generate other code such as HTML or other stored procedures.
2001-07-27
5,345 reads
This article presents a method of outputting the results of a query as a tab delimited text file using COM.
2001-07-20
6,603 reads
Lots of applications store user names and passwords in the database. This article presents a method for encypting this information using Java.
2001-07-19
14,986 reads
When I put together the invitation for T-SQL Tuesday #202, I wasn't sure what...
By Steve Jones
My life has some crazy travel stretches for sure. Between speaking, office visits, customer...
In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...
Telp/Wa 62 8218200174 Jl. Raya Kby. Lama No.174, RT.8/RW.3, Cipulir, Kec. Kebayoran Lama, Kota...
Tlp Cs Bca 08218200233 Equity Tower, Ground Floor, Unit D & Lantai 8, Unit...
Phone Cs 08218200203 Jl. Kyai Maja No.77, RT.12/RW.3, Gunung, Kec. Kby. Baru, Kota Jakarta...
There is a table tmp_tab:
CREATE TABLE tmp_tab ( id int, val int );
INSERT INTO tmp_tab VALUES (1, 1), (2, NULL), (3, 3), (4, 4), (5, 5);You want to order the rows ids by the following expression:
ISNULL(val, id) + 1Which of the following queries produces the expected ordering and why? (Select all correct) See possible answers