MSSQL动态语句极致操控游标(mssql游标动态语句)
MSSQL动态语句极致操控游标
游标的概念不解释了,大家都比较熟悉,在MSSQL中有三种游标,分别是静态游标、只读游标、可更新游标。在这里,我将重点介绍MSSQL动态语句极致操控游标。
MSSQL动态语句极致操控游标,不仅可以完成select/insert/update/delete等常规操作,还可以更精细地操作游标。下面是用SQL语句动态操作游标的具体步骤:
第一步:定义游标
“`sql
declare c_articles cursor
for
select article_title from articles;
第二步:打开游标```spec
open c_articles
第三步:借助游标循环取出数据
“`sql
fetch next from c_articles into @article_title
while @@fetch_status=0
begin
select @article_title
fetch next from c_articles into @article_title
end
第四步:关闭游标```sql
close c_articles
第五步:释放游标
“`sql
dealloc c_articles
只要你用上述五步,你就可以通过MSSQL动态语句极致操控游标,完成完美的分页结果展示!看一看POST文章的SQL动态语句:
```sql declare @count int
select @count=count(*) from articles
declare @count_max intset @count_max=@count
declare @count_pages intselect @count_pages=@count_max/10
declare @per_pages int if(@count_max%10>0)
set @per_pages=@count_pages+1else
set @per_pages=@count_pages
declare @count_current intset @count_current=1
declare c_articles cursor for
select article_content,article_title from articles order by article_id
open c_articles
fetch next from c_articles into @article_title,@article_content
while @@fetch_status=0begin
if @count_current=1 select @article_content,@article_title
if @count_current=@per_pages
break;
if @count_current select @article_content,@article_title
set @count_current=@count_current+1
fetch next from c_articles into @article_title,@article_contentend
close c_articlesdealloc c_articles
通过上述SQL语句,我们可以将POST文章进行分页,从而实现文章的页面展示,提供更好的MSSQL动态语句极致操控游标的体验。