mysql

问题 Hello I am trying to add mysql database in my Keycloak server. I've added module.xml and mysql-connector-java-5.1.42-bin.jar under /modules/system/layers/base/com/mysql/main. When I am running the command to add mysql module, ./jboss-cli.sh, it errors out with Exception in thread "CLI Terminal Connection (uninterruptable)" java.lang.ArithmeticException: / by zero And when i am trying to start Keycloak, I am also notified that there is a missing service. service jboss.jdbc-driver.mysql

问题 I have the following php mysql statment that is working fine: if (isset($_GET['name'])) { $data = "%".$_GET['name']."%"; $sql = 'SELECT * FROM tbl_clients WHERE fname like ?'; $stmt = $conn->prepare($sql); $results = $stmt->execute(array($data)); $rows = $stmt->fetchAll(); $error = $stmt->errorInfo(); } But i want to add the following so it can check to columns for the name variable: $sql = 'SELECT * FROM tbl_clients WHERE fname like ? or lname like ?'; If i modify this statement to the above

问题 With reference to this question (How to get the sum in a joined table when using group by - getting wrong results) I have two tables orders and order_items . I need to group the results by days. But I also need to get the sum of energy_used for each day from another table. When I try that using a join, I get wrong order_sum for each day (they are not being summed up). Not sure what I am doing wrong. I would like to get for each day the sum of order_items.energy_used for all orders created

问题 With reference to this question (How to get the sum in a joined table when using group by - getting wrong results) I have two tables orders and order_items . I need to group the results by days. But I also need to get the sum of energy_used for each day from another table. When I try that using a join, I get wrong order_sum for each day (they are not being summed up). Not sure what I am doing wrong. I would like to get for each day the sum of order_items.energy_used for all orders created

问题 I am making a medical software and I am stuck at a point. I have to make a report section where user will fill up the reports for the patient. The main catch is since the fields/column is variable(less/more). Say if I fill up form in blood test, columns option are different and for X-ray columns is different. I have made a database so it will store option values for that test id and patient id CREATE TABLE IF NOT EXISTS `mp_tests_options` ( `test_optn_id` int(11) NOT NULL AUTO_INCREMENT,

问题 I am trying to get the total of the unknown columns at runtime from a table. Here's the source_table: +----+------------+-----------+-----------+-----------+-----------+-----------+ | ID | Name | Unknown 1 | Unknown 2 | Unknown 3 | Unknown 4 | Unknown 5 | +----+------------+-----------+-----------+-----------+-----------+-----------+ | 1 | abc | 10.00 | 18.00 | 5.00 | 21.00 | 6.00 | +----+------------+-----------+-----------+-----------+-----------+-----------+ | 2 | ghq | 22.00 | 14.00 | 12

问题 I am trying to work with mysql relations in Node Js(express Js) using Sequelize. User.hasMany(Post); work just fine, but when i try to inverse it in Post model like: Post.belongsTo(User); got this error: throw new Error(${source.name}.${_.lowerFirst(Type.name)} called with something that's not a subclass of Sequelize.Model); Error: post.belongsTo called with something that's not a subclass of Sequelize.Model User model like: const Sequelize = require('sequelize'); const db = require('..

问题 I am trying to work with mysql relations in Node Js(express Js) using Sequelize. User.hasMany(Post); work just fine, but when i try to inverse it in Post model like: Post.belongsTo(User); got this error: throw new Error(${source.name}.${_.lowerFirst(Type.name)} called with something that's not a subclass of Sequelize.Model); Error: post.belongsTo called with something that's not a subclass of Sequelize.Model User model like: const Sequelize = require('sequelize'); const db = require('..

问题 How can I build this HTML code: <ul class="tree"> <li>Animals <ul> <li>Birds</li> <li>Mammals <ul> <li>Elephant</li> <li>Mouse</li> </ul> </li> <li>Reptiles</li> </ul> </li> <li>Plants <ul> <li>Flowers <ul> <li>Rose</li> <li>Tulip</li> </ul> </li> <li>Trees</li> </ul> </li> </ul> From this structure: CREATE TABLE `categories` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `position` INT(11) DEFAULT NULL, `parent_id` INT(11) DEFAULT NULL, PRIMARY KEY (`id`), KEY `parent_id_fk` (`parent_id`),

问题 I'm trying to learn SQL but hitting a wall with the following problem. I can solve it easily using imperative programming but would like to know if it's possible to solve this problem using just a query: Input Table 1 (users) ID | Firstname -------------- 1 | Felix 2 | Michael 3 | Tobias Table 2 (hobbies) ID | Hobby | User ------------------------ 1 | cooking | 1 2 | cat | 1 3 | piano | 2 Wanted Output { "users": [{ "firstname": "Felix", "hobbies": [{ "id": 1, "name": "cooking" }, { "id": 2,