SQL中insert語句的用法有哪些

小億
676
2023-07-06 22:46:53
欄目: 云計(jì)算

在SQL中，INSERT語句用于向數(shù)據(jù)庫表中插入新的行。INSERT語句的用法有以下幾種：

  1. 插入全部列：INSERT INTO table_name VALUES (value1, value2, …);

例如：INSERT INTO customers VALUES (1, ‘John’, ‘Doe’, ‘john@example.com’);

  1. 插入指定列：INSERT INTO table_name (column1, column2, …) VALUES (value1, value2, …);

例如：INSERT INTO customers (id, first_name, last_name, email) VALUES (1, ‘John’, ‘Doe’, ‘john@example.com’);

  1. 插入多行：INSERT INTO table_name (column1, column2, …) VALUES (value1, value2, …), (value1, value2, …), …;

例如：INSERT INTO customers (id, first_name, last_name, email) VALUES (1, ‘John’, ‘Doe’, ‘john@example.com’), (2, ‘Jane’, ‘Smith’, ‘jane@example.com’);

  1. 插入查詢結(jié)果：INSERT INTO table_name (column1, column2, …) SELECT column1, column2, … FROM another_table;

例如：INSERT INTO customers (id, first_name, last_name, email) SELECT id, first_name, last_name, email FROM new_customers;

這些是INSERT語句的常見用法，可以根據(jù)具體需求選擇適合的方式進(jìn)行插入操作。

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