Oracle SQL查询带变量的问题

[cailee]

刚从SQL Server转过来，对oracle一知半解。
请问如下SQL server的写法，oracle如何写？
即先定义变量并赋值之后，查询的sql可以使用该变量。

DECLARE @name varchar(20)
SET @name='张三'

SELECT * FROM TableName WHERE  NAME=@name

谢谢

[壹四]

declare
v_name varchar2(20) := '张三';
begin
select * from tablename where name = v_name;
end;
 

[雨巷啊]

DECLARE V_NAME EMP.name%TYPE := '张三'; SQL_STMT VARCHAR2(300); BEGIN SQL_STMT := 'SELECT * FROM tableName WHERE name=:1'; EXECUTE IMMEDIATE SQL_STMT USING V_NAME; END;

[qq_28538637]

DECLARE
 a  number :=10;
BEGIN
  dbms_output.put_line(a+10);
END;

[qq_28538637]

DECLARE
  sql_stmt  VARCHAR2(200);
  emp_id    NUMBER(4) := 1001;
  salary    NUMBER(7, 2);
  dept_id   NUMBER(2) := 6;
  dept_name VARCHAR2(13) := '部门1';
  locations VARCHAR2(13) := '地址1';
  emp_rec   scott%ROWTYPE;
BEGIN
  EXECUTE IMMEDIATE 'CREATE TABLE bonus4(id NUMBER,amt NUMBER)';
  sql_stmt := 'INSERT INTO dept VALUES (:1,:2,:3)';
  EXECUTE IMMEDIATE sql_stmt
    USING dept_id, dept_name,locations;
  sql_stmt := 'SELECT * FROM  scott where empno= :id';
  EXECUTE IMMEDIATE sql_stmt  INTO emp_rec
    USING emp_id;
  sql_stmt := 'UPDATE scott SET sal= 2000 WHERE empno=:1
     RETURN  sal INTO :2';
  EXECUTE IMMEDIATE sql_stmt USING emp_id RETURNING INTO salary;

  EXECUTE IMMEDIATE 'DELETE FROM dept WHERE deptno =:num'
    USING dept_id;

END;

[壹四]

引用 1 楼 w67995822 的回复:

declare
v_name varchar2(20) := '张三';
begin
select * from tablename where name = v_name;
end;
 

额。。。不好意思oracle的块中是不能用select的。。只能用select into 或者动态语句，你可以查询之后into一个记录类型，然后输出记录数据。

[有意1314]

DECLARE V_NAME EMP.name%TYPE := '张三'; SQL_STMT VARCHAR2(300); BEGIN SQL_STMT := 'SELECT * FROM tableName WHERE name=:1'; EXECUTE IMMEDIATE SQL_STMT USING V_NAME; END;

[david8501]

使用declare定义变量