在pl/sql中是否有可能循环遍历需要在pl/sql语句的WHERE子句中使用的许多ID. sql语句本身非常简单,但是我需要遍历许多id:
Is it possible in pl/sql to loop through a number of id's that need to go in the WHERE clause of the pl/sql statement. The sql statement itself is pretty simple, but I need to iterate over a number of id's:
SELECT x_name FROM table_x WHERE x_id = {array of 90 id's};如何在此处插入90个id,以便sql遍历它们?我尝试使用游标For Loop,但遇到问题.下面的代码是错误的,但是它可能表明我在这里想要实现的目标
How can I insert the 90 id's here so that sql iterates over them? I tried using the cursor For Loop, but I'm stuck. The code below is erroneous, but it might give an indication what Im trying to achieve here
DECLARE TYPE x_id_array IS VARRAY(3) OF NUMBER; CURSOR cur_x_id (x_ondz_id NUMBER) IS SELECT x_name FROM table_x WHERE x_id = var_ondz_id; loop_total integer; x_id x_id_array; name VARCHAR; BEGIN x_id_new := x_id_array(8779254, 8819930, 8819931); --3 for testing loop_total := x_id_new.count; FOR i in 1 .. loop_total LOOP dbms_output.put_line('x_id: ' || x_id_new(i) || '= Name: ' || x_name ); END LOOP; END; /预期的投放量为
x_id: 8779254= Name: Name_1 x_id: 8819930= Name: Name_2 x_id: 8819931= Name: Name_3 ... ... etc for all 90 id's in the array感谢您的帮助
推荐答案我们可以在集合上使用TABLE函数来获取数字/字符列表.
We can use TABLE function on a collection to get a list of numbers / character.
SELECT * FROM TABLE ( sys.odcinumberlist(8779254,8819930,8819931) ); 8779254 8819930 8819931这里我使用的是Oracle内部的VARRAY,限制为32767.您可以使用自己的NESTED TABLE类型.
Here I'm using Oracle's internal VARRAY with a limit of 32767. You may use your own NESTED TABLE type.
create OR REPLACE TYPE yourtype AS TABLE OF NUMBER;然后选择它.
SELECT * FROM TABLE ( yourtype(8779254,8819930,8819931) );因此,您的查询可以简单地写为
So, your query can simply be written as
SELECT x_name FROM table_x WHERE x_id IN ( SELECT * FROM TABLE ( yourtype(8779254,8819930,8819931) ) );12.2及更高版本,您甚至无需指定TABLE.
12.2 and above, you won't even need to specify TABLE.
SELECT * FROM yourtype(8779254,8819930,8819931)有效.
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