Oracle Regular Expressions. Dangerous Range

Oracle Regular Expressions. Dangerous Range
5 (100%) 1 vote[s]

An Oracle developer who often uses regular expressions in code sooner or later can face a phenomenon that is indeed mystical. Long-term searches for the root of the problem can lead to weight loss, appetite and provoke various kinds of psychosomatic disorders – all this can be prevented with the help of the regexp_replace function. It can have up to 6 arguments:

REGEXP_REPLACE (

  1. source_string,
  2. template,
  3. substituting_string,
  4. the start position of the match search with a template (default 1),
  5. a position of occurrence of the template in a source string (by default 0 equals all occurrences),
  6. modifier (so far it is a dark horse)

)

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Pivot Tables in MySQL

Pivot Tables in MySQL
4.7 (93.33%) 6 vote[s]

  1. Briefly about Pivot tables
  2. Pivoting data by means of tools (dbForge Studio for MySQL)
  3. Pivoting data by means of SQL
  4. Automating data pivoting, creating query dynamically

Briefly about Pivot tables

This article deals with the transformation of table data from rows to columns. Such transformation is called pivoting tables. Often, the result of the pivot is a summary table in which statistical data are presented in the form suitable or required for a report. Read More