喜欢在sqlite中查询

Question

NSString * strSearchSql = [NSString stringWithFormat:@"SELECT pdf_id,pdf_name,page_no,pdf_image,pdf_text FROM search WHERE pdf_text LIKE '\%%@\%'",strSearchString];

在此查询中,我得到了如下所示的字符串

SELECT pdf_id,pdf_name,page_no,pdf_image,pdf_text FROM search WHERE pdf_text LIKE '%@'

我想要这样

SELECT pdf_id,pdf_name,page_no,pdf_image,pdf_text FROM search WHERE pdf_text LIKE '%searchtext%'

请给我提示或提供一份文件.

Answer 1

%像这样转义查询中的符号%%而不是\%.

NSString *strSearchSql = [NSString stringWithFormat:@"SELECT pdf_id,pdf_name,page_no,pdf_image,pdf_text FROM search WHERE pdf_text LIKE '%%%@%%'", strSearchString];