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- EXEC The EXEC command is used to execute a stored procedure. The following SQL executes a stored procedure named "SelectAllCustomers": Example EXEC SelectAllCustomers;
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- Write a SQL query to fetch “FIRST_NAME” from the Student table in upper case and use ALIAS name as STUDENT_NAME. SELECT upper(FIRST_NAME) as STUDENT_NAME from Student;
- Write a SQL query to fetch unique values of MAJOR Subjects from Student table. SELECT DISTINCT MAJOR from STUDENT; or SELECT MAJOR FROM STUDENT GROUP BY(MAJOR);
- Write a SQL query to print the first 3 characters of FIRST_NAME from Student table. SELECT SUBSTRING(FIRST_NAME, 1, 3) FROM Student;
- Write a SQL query to find the position of alphabet (‘a’) int the first name column ‘Shivansh’ from Student table. SELECT INSTR(FIRST_NAME, 'a') FROM Student WHERE FIRST_NAME = 'Shivansh';
EXEC. The EXEC command is used to execute a stored procedure. The following SQL executes a stored procedure named "SelectAllCustomers":
Write and execute SQL queries within Python scripts; Store and manipulate query results using pandas DataFrames; Lesson 2: Creating Data Visualizations. Use matplotlib to create charts directly from SQL query results; Combine SQL data retrieval and Python visualization in a single script
- What Is Relational Database?
- Important Terminologies
- How Queries Can Be Categorized in Relational Database?
- Different Query Combinations
- Aggregation Functions
- Conclusion
A relational database means the data is stored as well as retrieved in the form of relations (tables). Table 1 shows the relational database with only one relation called STUDENTwhich stores ROLL_NO, NAME, ADDRESS, PHONE,and AGEof students. STUDENT Table
These are some important terminologies that are used in terms of relation. 1. Attribute:Attributes are the properties that define a relation. e.g.; ROLL_NO, NAME etc. 2. Tuple:Each row in the relation is known as tuple. The above relation contains 4 tuples, one of which is shown as: 1. Degree:The number of attributes in the relation is known as deg...
The queries to deal with relational database can be categorized as: 1. Data Definition Language:It is used to define the structure of the database. e.g; CREATE TABLE, ADD COLUMN, DROP COLUMN and so on. 2. Data Manipulation Language:It is used to manipulate data in the relations. e.g.; INSERT, DELETE, UPDATEand so on. 3. Data Query Language:It is us...
Case 1: If we want to retrieve attributes ROLL_NOand NAMEof all students, the query will be: Case 2: If we want to retrieve ROLL_NO and NAMEof the students whose ROLL_NOis greater than 2, the query will be: CASE 3: If we want to retrieve all attributes of students, we can write * in place of writing all attributes as: CASE 4: If we want to represen...
Aggregation functions are used to perform mathematical operations on data values of a relation. Some of the common aggregation functions used in SQL are: 1. COUNT:Count function is used to count the number of rows in a relation. e.g; 1. SUM:SUM function is used to add the values of an attribute in a relation. e.g; In the same way, MIN, MAX and AVG ...
SQL is a standard language used to manage data in relational databases. SQL is mainly divided into four main categories: Data definition language, data manipulation language, transaction control language, and data query language and SQL is a powerful language that can be used to carry out a wide range of operations like insert ,delete and update.
Jan 1, 2024 · It is used to access and manipulate data in a database, including creating and modifying tables and columns and querying the data using SQL commands. This post will undoubtedly give you some insights if you’re looking for questions and answers to use while you prepare for a SQL interview.
Aug 9, 2022 · SQL, or Structured Query Language, is a programming language designed to interact with databases. When you want to access data in a database, be it to alter, delete, add, or simply extract information, you use SQL.
Jul 28, 2022 · Jul 28, 2022 · 21 min read. What is an SQL query? SQL stands for S tructured Q uery L anguage. People often pronounce it as either “S-Q-L” or “sequel.” SQL is used in programming and is designed for managing data stored in a database using SQL queries.
