by David Schlegl
NVL and NVL2 are Oracle specific and where introduced before the ANSI-92 standard (which includes COALESCE) was created. NVL and COALESCE are nearly identical, even there are some differenced I would like to point...
Accidentally, important data was deleted. Of course not in a test system but during operation. The pulse and blood pressure rises. But do not worry – it is not always necessary to back up...
If you want to calculate a value with a function which is stored in the table (row or column) you can use the follwing code to execute the math formula. Replace placeholders with the...
PL/SQL normally treads the whole modification as a single transaction. If you want to have some part of the code as seperate transaction, you can use the functionallity of autonomous transactions. The statement PRAGMA...
Aggregation Cube If you have dimensions, you can use the cube function. Imagine you have the dimensions time, state and product. When you use the cube function, you can get an insight of these...
Problem An Excel template was created (with the variables according to AOP) including line wrapping (text wrap, line break). During the subsequent document creation, however, the line break is not taken into account (not...
Write protection can be applied to tables. This prevents DDL (Data Definition Language) and DML (Data Manipulation Language) changes during maintenance mode. The statement: ALTER TABLE tablename READ ONLY; — nur mehr lesbar ALTER...
In principle, Snippet and Code Template serve the same purpose: Previously created code is inserted at the desired location. The only difference between the two tools is the paste option. Snippets require the Snippets...
SQL IN list SQL IN Statement (IN lists) can only process and validate 1000 values. Everything about it returns an error. Here’s an example to demonstrate an IN list. Here only employees and workers...
NVL VS NVL2 The difference between the SQL functions NVL and NVL2 is, that when using the function NVL2 you can set different values for NULL and NOT NULL. NVL only checks and analyzes...
