在Oracle中，如何将表中的Count（*）读入变量？

Question

在Oracle中，您如何从表中读取Count(*)变量？

在Microsoft SQL Server中，您可以这样做

select @variable = count(*) from Table where x=1;

我在Oracle中尝试过类似的尝试无效：

SELECT v_count_of_rows_bad := Count(*) FROM SCHEMANAME.TABLENAME WHERE ...;

Answer 1

您使用SELECT INTO

SELECT COUNT(*)
  INTO v_count_of_rows_bad
  FROM schemaname.tablename
 WHERE ...

Answer 2

Easy Peasie：

DECLARE
  v_count_of_rows_bad NUMBER;
BEGIN
  SELECT COUNT(*) INTO v_count_of_rows_bad FROM SCHEMANAME.TABLENAME WHERE ...;
END