SQL Developer
Database Development
Step by step guide to learning SQL in 2025
16 个阶段
71 个技能
系统化的学习路线，从基础到进阶，循序渐进掌握核心技能
1
Learn the Basics
核心技能点
Type Casting
Exceptions
SQL vs NoSQL Databases
阶段学习资源
2
Learn the Basics
核心技能点
SQL Keywords
Data Types
Operators
statements
阶段学习资源
3
Data Definition Language (DDL)
核心技能点
Drop Table
Create Table
Alter Table
Truncate Table
阶段学习资源
4
Data Manipulation Language (DML)
核心技能点
Select
FROM
WHERE
ORDER BY
GROUP BY
HAVING
JOINs
INSERT
还有 2 个技能点
阶段学习资源
5
Aggregate Queries
核心技能点
SUM
COUNT
AVG
MIN
MAX
GROUP BY
HAVING
6
Data Constraints
核心技能点
Primary Key
Foreign Key
Unique
NOT NULL
CHECK
阶段学习资源
7
JOIN Queries
核心技能点
INNER JOIN
LEFT JOIN
RIGHT JOIN
FULL OUTER JOIN
Self Join
Cross Join
阶段学习资源
8
Subqueries
核心技能点
types
Nested Subqueries
Correlated Subqueries
阶段学习资源
9
Advanced Functions
核心技能点
FLOOR
ABS
MOD
ROUND
CEILING
conditional
string
date-time
10
Views
核心技能点
Creating Views
Modifying Views
Dropping Views
阶段学习资源
11
Indexes
核心技能点
Managing Indexes
Query Optimization
阶段学习资源
12
Transactions
核心技能点
ACID
BEGIN
COMMIT
ROLLBACK
SAVEPOINT
Transaction Isolation Levels
阶段学习资源
13
Data Integrity & Security
核心技能点
Data Integrity Constraints
GRANT and Revoke
DB Security Best Practices
15
Performance Optimization
核心技能点
query-optimization
Query Analysis Techniques
阶段学习资源
16
Advanced SQL
核心技能点
Recursive Queries
Pivot / Unpivot Operations
Window Functions
Common Table Expressions
Dynamic SQL
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