sql server - What does "SELECT X=[column] FROM [table] exactly does"? -

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i wanted set variable in sql by

select @myvariable=mycolumn mytable ...

but mistake wrote without @

select myvariable=mycolumn mytable ...

it seems valid, there isn't error in syntax, although variable of course isn't set.

so such instruction do?

this sets myvariable alias mycolumnn. it's same as:

select  mycolumn myvariable    mytable   ...

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