sql語句大全
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1、建立表:
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CREATE TABLE table_name (
column1 datatype,
column2 datatype,
column3 datatype,
...
);
2、插入資料:
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INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);
更新資料:
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UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
3、刪除資料:
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DELETE FROM table_name
WHERE condition;
4、查詢資料:
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SELECT column1, column2, ...
FROM table_name
WHERE condition;
5、按條件排序:
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SELECT column1, column2, ...
FROM table_name
WHERE condition
ORDER BY column1 ASC/DESC;
6、使用聚合函式計算資料:
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SELECT COUNT(column_name) FROM table_name;
SELECT SUM(column_name) FROM table_name;
SELECT AVG(column_name) FROM table_name;
SELECT MAX(column_name) FROM table_name;
SELECT MIN(column_name) FROM table_name;
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