从Oracle数据库中读取数据自动生成INSERT语句的方法

oracle insert 语句

方法1

我估计有点 sql 基础的人都会写 insert 语句。下面是 sql 标准写法。

insert into employees (employee_id, name) values (1, 'zhangsan');
insert into employees values (1, 'shangbo');

方法2

其实， oracle 还支持下面的写法，作用和上面的语句完全相同。

insert into (select employee_id, name from employees) values (2, 'lisi');

方法3

此外，同其他数据库一样，oracle 也支持下面这种写法。

insert into employees
select 3, 'wangwu' from dual;

方法4

下面这种写法可以实现列转行，如我们有下面的表存储原始数据，原始数据可能从文件中来。

create table sales_input_table (
prod_id    number(9,0),
amt_mon    number(9,6),
amt_tue    number(9,6),
amt_wed    number(9,6),
amt_thu    number(9,6),
amt_fri    number(9,6)
);
insert into sales_input_table values (1, 100.0, 200.0, 300.0, 400.0, 500.0);

下面我们通过一个 sql 把上面的数据插入到下面的表中实现列转行。

create table sales (
prod_id    number(9,0),
time_id    date,
amount     number(9,0)
);
insert all
into sales (prod_id, time_id, amount) values (prod_id, current_date, amt_mon)
into sales (prod_id, time_id, amount) values (prod_id, current_date + 1, amt_tue)
into sales (prod_id, time_id, amount) values (prod_id, current_date + 2, amt_wed)
into sales (prod_id, time_id, amount) values (prod_id, current_date + 3, amt_thu)
into sales (prod_id, time_id, amount) values (prod_id, current_date + 4, amt_fri)
select prod_id, amt_mon, amt_tue, amt_wed, amt_thu, amt_fri from sales_input_table;

方法5

下面这种写法可以帮我们一次性把一个表中的数据倒入到多个表中，否则我们必须写多条 sql 实现同样的功能。

insert all
when order_total <= 100000 then
into small_orders
when order_total > 100000 and order_total <= 200000 then
into medium_orders
when order_total = 500000 then
into special_orders
when order_total > 200000 then
into large_orders
else
into large_orders
select order_id, order_total, sales_rep_id, customer_id from orders;

注意，当 order_total 大于 200000 时，orders 会被插入到 large_orders 和 special_orders 中。这可能不是你想要的结果，如果你只想让 orders 插入到 special_orders 表中，你只需要把 all 替换成 first， 如下。

insert first
when order_total <= 100000 then
into small_orders
when order_total > 100000 and order_total <= 200000 then
into medium_orders
when order_total = 500000 then
into special_orders
when order_total > 200000 then
into large_orders
else
into large_orders
select order_id, order_total, sales_rep_id, customer_id from orders;

从oracle数据库中读取数据，自动生成insert语句

创建表

-- create table
create table tb_accident_type
(
 id     number(20) not null,
 name    varchar2(50),
 path    varchar2(20),
 parentpath varchar2(20),
 url    varchar2(20),
 type    varchar2(2),
 descr   varchar2(50)
)

显示表中的数据

select 'insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values(' || '''' || id ||'''' || ','
|| '''' || name || '''' || ','
|| '''' || path || '''' || ','
|| '''' || parentpath || '''' || ','
|| '''' || url || '''' || ','
|| '''' || type || '''' || ','
|| '''' || descr || '''' || ');' 
 from tb_accident_type order by id

显示结果

insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('1','事故类型关联 ','1','0','','0','');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('2','危险源类型关联','2','0','','','');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('3','危险品类型关联','3','0','','','');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('4','生产企业类型关联','4','0','','','');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('5','区域关联','5','0','','0','');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('568','物体打击','1.1','1','','1','物体打击');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('569','车辆伤害','1.2','1','','1','车辆伤害');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('570','机器伤害','1.3','1','','1','机器伤害');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('571','起重伤害','1.4','1','','1','起重伤害');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('572','触电','1.5','1','','1','触电');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('573','淹溺','1.6','1','','1','淹溺');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('574','灼烫','1.7','1','','1','灼烫');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('575','火灾','1.8','1','','1','火灾');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('576','高处坠落','1.9','1','','1','高处坠落');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('577','坍塌','1.10','1','','1','坍塌');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('578','冒顶片帮','1.11','1','','1','冒顶片帮');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('580','透水','1.12','1','','1','透水');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('581','波炮','1.13','1','','1','波炮');insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('582','火药爆炸','1.14','1','','1','火药爆炸')insert into tb_accident_type (id,name,path,parentpath,url,type,descr)
 values('583','瓦斯爆炸','1.15','1','','1','瓦斯爆炸');

总结

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