[英]How can I use multiple values in SQL variable in PostgresSQL/plpgsql?
I want to declare variable as v_nk varchar;
我想将变量声明为v_nk varchar;
then assign the variable v_nk := ''S001234','S23401','S34509','S9900'';
然后分配变量v_nk := ''S001234','S23401','S34509','S9900'';
and use this variable in select query 并在选择查询中使用此变量
select * from mytable where nk in (v_nk);
I want to use this in one of my program(plpgsql) can you please tell me how I should use it? 我想在我的一个程序(plpgsql)中使用它,可以告诉我如何使用它吗?
You can use array : 您可以使用array:
v_nk := ARRAY [ 'S001234'::text ,'S23401','S34509','S9900'];
OR 要么
v_nk := '{S001234,S23401,S34509,S9900}'::text[];
and use this variable in select query: 并在选择查询中使用此变量:
select * from mytable where nk = ANY (v_nk);
you can define array instead of variable like this: 您可以定义数组而不是像这样的变量:
DECLARE nk_array VARCHAR(30)[] = '{'S001234','S23401','S34509','S9900' }';
select * from mytable where nk in nk_array;
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