in this  work the development of a  tool for the  Perl programming language  source code analysis  for algorithm visualizationis considered . A theoretical basis is considered, which can help approach the implementation of the tool and analyze the source code of the program in Perl. An overview of the existing visualization tools for source code  programs is  made,  on the  basis  of  which  we  formulated  the  requirements  for  the  developed  software. The tools for the analysis of program code are considered. The application that reads from a file the program  text and builds a diagram that can be edited and then saved to a fileis designed, implemented and tested

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In this work we consider a solution that helps to increase the speed of search and retrieval of data in relational database management systems, such as ORACLE and MySQL.

This solution is called the index. We consider the types of indexes that are unique only for a particular database and indexes that are used in all DBMS.

The test database for experiments is created. The analysis is performed on certain types of queries, the same for all test databases. Based on the results of queries made a number of recommendations for using specific indexes in data-bases for specific types of request, as well as some general advice on writing relational queries