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Editor to share with you how to add, delete, modify and check the conditional statement of sql database information. I hope you will gain a lot after reading this article. Let's discuss it together.

You can query the database, insert data into the database, update the data in the database, delete the data in the database, and add a new data database to the database.

(Database) is a warehouse that organizes, stores and manages data according to data structure. with the development of information technology and market, data management is no longer just storing and managing data, but has been transformed into a variety of data management methods needed by users.

The following are examples of adding, deleting, modifying and checking sql statements:

1. Addition, deletion, modification and query statements commonly used in sql: insert into data sheet (field 1, field 2, field 3) values (value 1, value 2, value 3)

String sql= "insert into employees (id,username,age) values (22 meme 2)"

2. Deletion of sql statement: the ID parameter received by where id= in delete from data table

String sql2= "delete from employees where id=22"

Third, the addition, deletion and modification of the sql table: update data table set field 1 = value 1, field 2 = value 2 ID parameters received by where id=

String sql3= "update employees set username='zhang',age='2222' where id=1"

IV. Inquiry

String sql4= "select * from employees where id=1"; after reading this article, I believe you have a certain understanding of how to add, delete, modify and query conditional statements in sql database. You want to know more about it. Welcome to follow the industry information channel. Thank you for your reading!

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