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docs (level 101): fix typos, punctuation, formatting (#160)

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* docs: formatted for readability

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* docs: fix typos, punctuation, formatting

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* docs: fix caps and formatting

* docs: fix punctuation and formatting

* docs: capitalized SQL commands, fixed puntuation, formatting

* docs: fix punctuation

* docs: fix punctuation and formatting

* docs: fix caps,punctuation and formatting

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* docs: fix punctuation, indentation and formatting
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Jana R
2024-07-28 17:38:19 +05:30
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courses/level101/databases_sql/intro.md
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You will have an understanding of what relational databases are, their advantages, and some MySQL specific concepts.
### What is not covered under this course
* In depth implementation details
* In-depth implementation details
* Advanced topics like normalization, sharding
* Specific tools for administration
### Introduction
The main purpose of database systems is to manage data. This includes storage, adding new data, deleting unused data, updating existing data, retrieving data within a reasonable response time, other maintenance tasks to keep the system running etc.
The main purpose of database systems is to manage data. This includes storage, adding new data, deleting unused data, updating existing data, retrieving data within a reasonable response time, other maintenance tasks to keep the system running, etc.
### Pre-reads
[RDBMS Concepts](https://beginnersbook.com/2015/04/rdbms-concepts/)