Mar*_*son 20 oracle syntax oracle-10g
我的主要技能是使用 SQL Server,但有人要求我对 Oracle 查询进行一些调整。我编写了以下 SQL:
declare @startDate int
select @startDate = 20110501
Run Code Online (Sandbox Code Playgroud)
我得到这个错误:
declare @startDate int
select @startDate = 20110501
Error at line 1
ORA-06550: line 1, column 9:
PLS-00103: Encountered the symbol "@" when expecting one of the following:
begin function package pragma procedure subtype type use
<an identifier> <a double-quoted delimited-identifier> form
current cursor
Run Code Online (Sandbox Code Playgroud)
如何在 Oracle 中声明和使用变量?
ik_*_*elf 20
在 pl/sql 块中:
declare
startdate number;
begin
select 20110501 into startdate from dual;
end;
/
Run Code Online (Sandbox Code Playgroud)
使用绑定变量:
var startdate number;
begin
select 20110501 into :startdate from dual;
end;
/
Run Code Online (Sandbox Code Playgroud)
PL/SQL 过程成功完成。
SQL> print startdate
STARTDATE
----------
20110501
Run Code Online (Sandbox Code Playgroud)
在查询中:
select object_name
from user_objects
where created > to_date (:startdate,'yyyymmdd'); /*prefix the bind variable wïth ":" */
Run Code Online (Sandbox Code Playgroud)
SQL*Plus 支持附加格式:
DEFINE StartDate = TO_DATE('2016-06-21');
DEFINE EndDate = TO_DATE('2016-06-30');
SELECT
*
FROM
MyTable
WHERE
DateField BETWEEN &StartDate and &EndDate;
Run Code Online (Sandbox Code Playgroud)
请注意要在查询中执行替换的 & 符号。