How to query operation records in PL/SQL?

2 years ago
Isabella Edwards
1 minute

In PL/SQL, you can use the SELECT statement to query operation records. Here is an example:

DECLARE
   -- 定义变量用于存储查询结果
   v_id   NUMBER;
   v_name VARCHAR2(50);
BEGIN
   -- 查询操作记录并将结果存储到变量中
   SELECT id, name INTO v_id, v_name FROM your_table WHERE condition;

   -- 打印查询结果
   DBMS_OUTPUT.PUT_LINE('ID: ' || v_id);
   DBMS_OUTPUT.PUT_LINE('Name: ' || v_name);
EXCEPTION
   WHEN NO_DATA_FOUND THEN
      -- 如果没有找到匹配的记录，处理异常
      DBMS_OUTPUT.PUT_LINE('No data found.');
   WHEN TOO_MANY_ROWS THEN
      -- 如果找到多个匹配的记录，处理异常
      DBMS_OUTPUT.PUT_LINE('Too many rows found.');
   WHEN OTHERS THEN
      -- 处理其他异常
      DBMS_OUTPUT.PUT_LINE('An error occurred: ' || SQLERRM);
END;

Please note that you need to replace “your_table” and “condition” with the actual table name and query condition.

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