mysql - SQL REPLACE give error in phpmyadmin

Question

UPDATE 'module_tests' SET 'tests_content' = REPLACE('tests_content', '<a onclick=', '<a class="dic"  onclick=');

When I am tried to run top query in phpmysql it gave bellow error. Can someone tell me the reason for this?

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''module_tests' SET 'tests_content' = REPLACE('tests_content', '<a onclick=', '' at line 1

Answer 1

table删除和名称周围的单引号。您的column查询应该是这样的：

UPDATE module_tests SET tests_content = REPLACE(tests_content, '<a onclick=', '<a class="dic"  onclick=');

查看SQLFIDDLE

我怀疑，您对单引号（'）和反引号（`）有些困惑。在您的示例中，您可以使用反引号来确保您的表名和字段名称不会与 mysql 中的保留字发生冲突......使用反引号，您可以像这样修改查询：

UPDATE `module_tests` SET `tests_content` = REPLACE(`tests_content`, '<a onclick=', '<a class="dic"  onclick=');

查看带反引号的查询

Answer 2

将查询更改为：

UPDATE `module_tests` 
   SET `tests_content` = REPLACE(`tests_content`, '<a onclick=', '<a class="dic"  onclick=');

您将表和列名作为字符串传递。