Oracle sql語法大全
Oracle SQL是一種用於處理資料庫的程式語言,它提供了許多用於查詢、插入、更新和刪除數據的語法。以下是一些常見的Oracle SQL語法:
1. 創建資料庫表:
```sql
CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
...
);
```
2. 插入數據:
```sql
INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);
```
3. 查詢數據:
```sql
SELECT column1, column2, ...
FROM table_name
WHERE condition;
```
4. 更新數據:
```sql
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
```
5. 刪除數據:
```sql
DELETE FROM table_name WHERE condition;
```
6. 連線表:
```sql
SELECT column1, column2, ...
FROM table1, table2
WHERE table1.column = table2.column;
```
7. 排序數據:
```sql
SELECT column1, column2, ...
FROM table_name
ORDER BY column1 ASC/DESC;
```
8. 聚合函式:
```arduino
SELECT COUNT(column) AS count, SUM(column) AS sum, AVG(column) AS avg, MAX(column) AS max, MIN(column) AS min
FROM table_name;
```
9. 條件查詢:
```arduino
SELECT column1, column2, ...
FROM table_name
WHERE condition;
```
這只是Oracle SQL語法的一部分,還有許多其他功能和語法可用於處理資料庫。建議查閱Oracle官方文檔以獲取更詳細的信息和示例。
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