In the modern days, the data management is a much in-demand. Data management is the practice of maintaining and organizing data to meet the necessary information of on-going processes. With the age of E-data storage, the need for data processing started gaining impetus thus creating a need for a system which would be useful in the process of data management.
Every network and system have a certain database such as user details, password transaction details, etc.. These details are maintained securely in such a way that their manipulation, as well as management, is done by the company in an orderly manner. At such stage the SQL comes into use as SQL makes data management easy and companies data is transferred to and fro without any hassle .
Computer applications or in general all the software applications have become complex with age of smartphones being a predominant form of technology thus making data storing and data analyzing much complex. Database testing helps in maintaining the quality security and of the data done effectively. Here SQL comes into work as it is one of the most modern ways of data management.
SQL is an acronym of structured query language it is used to compare relational database or retrieve data write a query to use data and its structure in such a way that reports can be generated. It is better than its predecessors ISAM or VSAM as it eliminates the need of specifying how to reach a record.
- History of SQL
SQL was developed by Raymond F Boyce and Donald D Chamberlin at IBM at the beginning of the 1970s; it was earlier referred to as SEQUEL (short form for English query language) this system was developed in ordered to add and manipulate data on the system R which was quasi-relational and original database management system of IBM.
- Need for SQL
At this stage, one may think that what significance this SQL language carries in modern times. Well, as per the experts there are a lot of avenues where one can use this language and get the desired level of work. Most of the application now store data in their relational databases and SQL is the perfect language used to
- Create tables: Creation of tables which are normally used for the analysis and comparison can rightly be made with the help of SQL.
- Update data: As there is enough space provided for the modification one can easily make a necessary update in the data using SQL.
- Delete data: It also helps to remove the unwanted information by using the delete option here.
- Manipulate data
- Truncate table
Many more functions are provided here that can help the user to have a different use of data using SQL.
A software engineer needs to be good at relational data management systems thus one needs to be skilled in SQL too. It can be useful at the juncture when the data is huge, and one needs to do bifurcation of the same as per different parameters of the user.
Working on SQL test
A SQL test uses a defined framework, which is known as a tSQL framework, in this SQL unit testing runs through queries in order to check the values of the data type and to mock database objects
Why is SQL test done?
SQL test is useful in determining ones knowledge in SQL queries and relational database concept making it suitable for pre-employment screening in the field of database admin, back-end developer, data analyst, etc.
What is the SQL test?
This test has multiple choice questions queries to be solved related to data management as in relation to SQL, relational database concepts; it also requires the candidate to write SQL queries that combine, extract and manipulate data. Thus making it useful in determining the technical and software knowledge of a candidate appearing for the pre-employment tests.
Important features of SQL
SQL has three important types of commands
- DDL is used to create, change, rename, and shorten the tables and indexes.
- DML is used to add update and delete records.
- DCL is used to provide authorization to users to access, manipulate.
Reasons companies go for SQL test in screening the candidates for employment
SQL test helps in identifying the correct candidate for the assigned job as it runs through the data provided matches the best-suited profile of the candidate with the employer. It informs the employer of the technical know-how as well as the working capability of the candidate, would he be suited to the profile of the job thus helping the employer in selecting the best candidate for the job analytically.
How can SQL test be conducted?
Conducting an SQL test:
SQL test is an online test which takes not more than 45 minutes to 60 minutes to perform. Depending upon the profile of the company the test is compounded to suit their requirements. The scores of this test can be viewed as soon as this test is online in nature and summation process is quick thus result and would allow the employer to judge the candidate, and the candidates themselves would be made aware of the shortcomings which made their recruitment difficult.
Many companies regularly organize these tests in their relative department for mapping the progress and skill development of their employees; they form it the basis of promotion in their respective department where a certain skill set is required with respect to data management.
A firm may organize this test on its premises or any other place where a basic pc or a laptop for each candidate is available. In case of new recruitment, this test may be performed by the applicant online as well, making it easier for the company as well as the candidate.
Many online SQL tests are available for the firms to look into and select one which suits their respective area of data management. This SQL test would certainly benefit a company in screening the candidates prior to employment saving lots of resources.