Look at the title it is “How long does it take to learn SQL in 2021?”
It could be only “How long does it take to learn SQL ?
Why 2021 is attached to make it How long does it take to learn SQL in 2021?” ?
In this modern era of online learning methodology, there are several websites providing online SQL engine where you can experience more interactive way of learning and practicing.
Few online ways available for learning are
- Video Lectures
- Tutorial web sites offering Online SQL engine.
- Online certification courses
- e books
If you want to figure out that How long does it take to learn SQL in 2021 ?
First of all we should divide SQL as follows
2. PL/SQL and stored Procedures
3. Performance Tuning and Data base Administration.
1. Basic SQL
Full form of SQL is Structured Query Language. Lets have a look what we can do with the help of SQL.
- Create database
- Create table
- Insert record
- Delete record
- Update record
- Retrieve record
For every organization data is very important. These organisations maintain database that’s why there is a need to manage this database that’s why structured query language is required.
1.2 Time to learn basic SQL
It takes three to four weeks to learn basic SQL.
Books or e books are good for beginners who want to understand the concepts of data base
Online SQL tutorials are good for practical knowledge and practice.
2. What is PL/SQL and stored Procedures?
In basic SQL, it is possible to write SQL queries. there is no looping, decision making(if-else) . That’s why SQL uses a programming language(PL).
Programmers write stored procedures to perform the same task again and again.
2.1 Time to learn PL/SQL and stored Procedures
You should be ready to spend 30 to 40 days .
3. What is performance tuning and Database administration?
It is an advance level.
database performance tuning means to maximize the resource utilization
if you are doing performance tuning you can expect fast execution of SQL queries.
it is a broad term and include the optimization of both hardware and software, and importantly
- Main memory
- Secondary memory
optimization of Main memory/Secondary means to minimize the effect of memory fragmentation.
proper use of RAID(Redundant Array of inexpensive disk).
3.1 Key Factors in Performance Tuning Creation of table should follow the normalization.
- All the tables should be normalized as far as possible.
- Use of Index:- index should be used(if there is a plenty of search operations),it makes the record retrieval fast.
- Number to character conversion should be avoided as far as possible, because it degrades the performance.
- Instead of fetching all the fields of record, fetch only required fields.
- try to avoid the use of retrieval symbol * in SELECT queries(if possible).
- Try to use procedures.
3.2 Time to learn performance tuning and Database administration
Performance tuning and Database administration is a job profile which requires a sense of responsibility. That’s why it is a time consuming job to learn.
Performance tuning and database administration is an advance level so it takes another two to three months to learn.
Learning IT technologies is a matter of your interest. your interest in a particular technology is driving force for your learning.
There are many educational organizations offering courses to teach SQL and all. You can join any course of your choice but the actual learning begins when you join an organization as a professional.
In the field of information technology, lots of developments are taking place day by day.
It is not possible for any publication house to publish books on monthly basis to include all the latest updates in their books but in industry you can learn by developing solutions for real life problems.
If you have any query on database management system then comment your questions