我想向定义为变量的表中添加大约 50 列.这些列的名称来自另一个表,基本上它们只是数字 - DEPA_KEY.(部门键)
I would like to add around 50 columns to table defined as variable. Names of those columns are coming from another table and basically they are just numbers - DEPA_KEY. (department key)
是否可以使用循环或类似的东西动态添加这些列?
Is it possible to add those columns dynamically with loop or something similar?
表定义为变量(这里我想动态添加 50 列):
Table defined as variable (here I would like dynamically add 50 columns):
DECLARE @USERS TABLE
(
USER_KEY INT,
USDE_HSU DECIMAL(8,2)
)
查询所有部门:
SELECT DEPA_KEY FROM CADEPA
AFAIK,你不能改变表变量的结构:
AFAIK, You can't change the structure of a table variable:
DECLARE @T AS TABLE
(
col1 int
);
ALTER TABLE @T
ADD col2 char(1)
;
这会产生一个错误.
您可以,但是,使用临时表来做到这一点:
You can, however, do it with a temporary table:
CREATE TABLE #T
(
col1 int
);
ALTER TABLE #T
ADD col2 char(1)
;
这篇关于动态添加 50 列到表变量的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!