建站
咨詢(xún)
售后
建站咨詢(xún)
新聞中心
Using SQL Server statements to Construct Simple Databases
創(chuàng)新互聯(lián)是專(zhuān)業(yè)的內(nèi)黃網(wǎng)站建設(shè)公司，內(nèi)黃接單;提供網(wǎng)站制作、做網(wǎng)站,網(wǎng)頁(yè)設(shè)計(jì),網(wǎng)站設(shè)計(jì),建網(wǎng)站,PHP網(wǎng)站建設(shè)等專(zhuān)業(yè)做網(wǎng)站服務(wù);采用PHP框架,可快速的進(jìn)行內(nèi)黃網(wǎng)站開(kāi)發(fā)網(wǎng)頁(yè)制作和功能擴(kuò)展;專(zhuān)業(yè)做搜索引擎喜愛(ài)的網(wǎng)站,專(zhuān)業(yè)的做網(wǎng)站團(tuán)隊(duì),希望更多企業(yè)前來(lái)合作!
Nowadays, the development of database is popular among many companies and individual users. SQL Server is a widely used relational database management system with an easy-to-use interface, making it a great choice for constructing databases. In this article, I’ll show you how to use SQL Server statements to construct a simple database.
The main purpose of using SQL Server statements to create a database is to store and manipulate data. To begin constructing a simple database, we must first generate our table structure. This is done by using the Create Table statement. This statement lists the columns of the table and specifies their data type and size. For example:
CREATE TABLE users (
user_id INT
user_name VARCHAR(32)
user_role VARCHAR(32)
user_phone VARCHAR(12)
user_address VARCHAR(255)
PRIMARY KEY (user_id)
);
In this example, a “users” table is created with five columns and the “user_id” column as the primary key. Once this table is created, we can then begin populating the table with data using the Insert statement. This statement is used to add rows to the table. For example:
INSERT INTO users (user_id, user_name, user_role, user_phone, user_address)
VALUES (1, ‘John Doe’, ‘Admin’, ‘123-456-7890’, ‘123 Main Street’);
The above statement is used to add a new user to the “users” table. To retrieve data from the table, you can use the select statement. This statement selects data from the table and returns it in the form of a result set. For example:
SELECT user_id, user_name, user_role
FROM users
WHERE user_role = ‘Admin’;
The above statement is used to retrieve a list of all users with the role of “Admin”.
Finally, we can use the Update statement to modify existing data in the table. This statement is used to change the data in a row or set of rows. For example:
UPDATE users
SET user_phone = ‘999-999-9999’
WHERE user_id = 1;
The above statement changes the phone number of user with id 1 to “999-999-9999”.
By following these simple steps, you can use SQL Server statements to construct a simple database. With a few basic commands, you can easily create, retrieve and modify data in your database.
創(chuàng)新互聯(lián)-老牌IDC、云計(jì)算及IT信息化服務(wù)領(lǐng)域的服務(wù)供應(yīng)商，業(yè)務(wù)涵蓋IDC（互聯(lián)網(wǎng)數(shù)據(jù)中心）服務(wù)、云計(jì)算服務(wù)、IT信息化、AI算力租賃平臺(tái)（智算云），軟件開(kāi)發(fā)，網(wǎng)站建設(shè)，咨詢(xún)熱線(xiàn):028-86922220
網(wǎng)站名稱(chēng)：使用SQLServer語(yǔ)句構(gòu)建簡(jiǎn)單數(shù)據(jù)庫(kù)（sqlserver語(yǔ)音）
標(biāo)題路徑：http://www.dlmjj.cn/article/dhsdhhp.html
