最全的Oracle到高斯数据库的SQL语法迁移手册(建议收藏)
由于篇幅限制,这里仅提供高斯数据库(TencentDB for TDSQL)的SQL语法对照表和示例。
创建表:
Oracle:
CREATE TABLE employees ( id NUMBER(10) NOT NULL, name VARCHAR2(50), salary NUMBER(8,2), PRIMARY KEY (id) );
高斯数据库:
CREATE TABLE employees ( id BIGINT NOT NULL, name VARCHAR(50), salary DECIMAL(8,2), PRIMARY KEY (id) );
插入数据:
Oracle:
INSERT INTO employees (id, name, salary) VALUES (1, 'John Doe', 50000.99);
高斯数据库:
INSERT INTO employees (id, name, salary) VALUES (1, 'John Doe', 50000.99);
更新数据:
Oracle:
UPDATE employees SET salary = salary + 1000 WHERE id = 1;
高斯数据库:
UPDATE employees SET salary = salary + 1000 WHERE id = 1;
删除数据:
Oracle:
DELETE FROM employees WHERE id = 1;
高斯数据库:
DELETE FROM employees WHERE id = 1;
查询数据:
Oracle:
SELECT * FROM employees WHERE salary > 50000;
高斯数据库:
SELECT * FROM employees WHERE salary > 50000;
创建索引:
Oracle:
CREATE INDEX idx_employee_id ON employees (id);
高斯数据库:
CREATE INDEX idx_employee_id ON employees (id);
以上仅为部分SQL语法的对比示例,实际迁移时可能需要考虑更多复杂场景。在迁移之前,建议进行详尽的SQL语法和数据类型对比,并进行测试以确保语法的兼容性和性能的符合性。
评论已关闭