插入数据库时在数据中包含单引号

Question

我有一个字符串"I love McDonald's burgers. it's the best."

我想将它插入到一个列中，将它们分成 15 个字符串。

因此我需要将结果作为字符串插入 3 行

I love McDonald
's burgers. it'
s the best.

但是如果我使用' '来包含'，字符串中会出现一个额外的'，这将影响我计算 15 个字符的破损率。

是否有任何其他方式来包含“而不必再使用一个”来转义它？

请帮忙。

Answer 1

如果要将字符串分解为变量，则不需要添加额外的 ':

DECLARE
  mcdonald_string VARCHAR2(50) := 'I love McDonald''s burgers. it''s the best.';
BEGIN
  WHILE LENGTH(mcdonald_string) > 0 LOOP
    INSERT INTO your_table(your_field) VALUES (SUBSTR(mcdonald_string,1,15));
    mcdonald_string := SUBSTR(mcdonald_string,16);  
  END LOOP;

  COMMIT;
END;

Answer 2

Doubling the quotation marks within a complicated literal, particularly one that represents a SQL statement, can be tricky. You can also use the following notation to define your own delimiter characters for the literal. You choose a character that is not present in the string, and then do not need to escape other single quotation marks inside the literal:

-- q'!...!' notation allows the of use single quotes
-- inside the literal
string_var := q'!I'm a string, you're a string.!';

http://docs.oracle.com/cd/B19306_01/appdev.102/b14261/fundamentals.htm#sthref339

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