这是我到目前为止所做的：
DECLARE startDate DATE：= to_date(’03 / 11/2011′,’dd / mm / yyyy’);
其中我得到了答复：
ORA-06550: line 1,column 63: PLS-00103: Encountered the symbol@H_404_9@ “end-of-file” when expecting one of the following:
begin function package pragma procedure subtype type use form current@H_404_9@ cursor
Details: DECLARE startDate DATE := to_date(’03/11/2011′,@H_404_9@ ‘dd/mm/yyyy’); Error at line 1 ORA-06550: line 1,column 63:@H_404_9@ PLS-00103: Encountered the symbol “end-of-file” when expecting one of@H_404_9@ the following:
begin function package pragma procedure subtype type use form current@H_404_9@ cursor
我很想知道如何做这么简单的任务！
DECLARE关键字用于定义PL / sql块中的变量(其主体由BEGIN和END分隔;).你想如何使用这个变量？
以下PL / sql对我来说很好：
DECLARE
startDate DATE := to_date('03/11/2011','dd/mm/yyyy');
reccount INTEGER;
BEGIN
SELECT count(*) INTO reccount
FROM my_table tab
WHERE tab.somedate < startDate;
dbms_output.put_line(reccount);
END;
您还可以使用DEFINE语句来使用简单的字符串替换变量.它们适用于sql / PLUS或TOAD等客户端.
DEFINE start_date = "to_date('03/11/2011','dd/mm/yyyy')"
SELECT COUNT(*) from my_table tab where tab.some_date < &start_date;
