3.6 Selecting and opening the table in mysql

-

 Selecting and opening the table: -

  • To view the records from the table, we use “SELECT” statement.
  • Import mysql.connector.
  • Connect to MySQL database using connect( ) method.
  • Create a cursor( ) object then pass SQL select query command as a string to the execute( ) method.
  • Use fetchall( ) of cursor object to display all records in table.


  • To display all records from table, we use for loop in python.


  • The SQL command to select all the records from the table in database with python code is:

                Example: -


                     output: -


  • To display specific records from table, we use where clause. It filters the data as per the condition. We can fetch, delete or update a set of data in MySQL database.

  • The SQL command to select specific records from the table in database with python code is:



                       output: -




Using the ORDER BY clause: -


  • Order By clause is used to arrange the results set in either ascending or descending order.
  • By default, it is ascending order unless “DESC” is mentioned which is arrange the results in descending order.



  • The SQL command to arrange the records in order with python code is:

                Example: -



                        Output: -




Popular posts from this blog

operators in c programming

-
Image
v Operators: - An operator is a symbol that tells or intimates to the compiler to perform specific calculations or manipulations on one or more operands. Operators are essential for performing computations and making decisions in programs.   a + b is an operation a & b are operands + is an operator   Based on number of operands involved: 1.      Unary operators: - unary operators can be applied on only one operator. Example: -   ++ , -- , - (unary minus) , sizeof , ~ (compliment) , ! (not).   2.      Binary operators: - binary operators can be applied on two operands. Example: -   + , -,   * , / , etc.   3.    Ternary operators: - Ternary operator can be applied on three operands. Example: -   ?: (ternary conditional operator).   C supports several operators, can be classified into following...
Read more

Variables in c

-
Image
  Variables: - A variable is a data name or an identifier which stores a value that can be changed during the program execution.  Every variable might belong to any of the data types, like int, float, char, etc.  The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore.  Variables are case-sensitive because uppercase and lowercase letters are distinct. C programming language also allows defining various other types of variables, like numeric array, character array, pointer, Structure, Union, Enumeration and etc.               Example: - sum, height, _value Declaring a variable in C: - Variable declaration means telling the compiler about the name and type of a variable before using it in the program. Variable declaration is the process of reserving a memory location and defining the type of data that will be stored in that locatio...
Read more

Cloud Storage and Local Storage: Applications in Business

-
  Cloud Storage and  Local Storage: Applications in Business: -   Local Storage: - Local storage refers to storing data such as text, audio, video, graphics, animation, special characters, constants, mathematical expressions and numeric data on physical devices in our computer or other electronic devices. Local storage in business refers to storing business data such as customer contact information, sales records, financial statements, employee data, market research, operational metrics, raw information like customer feedback.  It can also stores the structured data, such as in spreadsheets, or unstructured, like text from surveys or social media post on physical devices like hard drives, SSDs, or company servers within the organization’s premises.  The business owns and manages the storage hardware.  Local storage provides faster access to large files, which is helpful for tasks like video editing, 3D rendering, and engineering design projects. It o...
Read more