multi-table

What is the syntax for a multi-table delete on a MySQL database using Doctrine?

由 半城伤御伤魂 提交于 2019-12-24 01:27:12
问题 Using Doctrine, I am trying to delete records in a single table based on data gathered from multiple tables. 'companies_groups' is an association table linking 'companies' to 'groups'. I want to delete all records in this table linked to a specific company, with the restriction that only 'companies_groups' records linked to a 'public' group will be deleted. If I were to write this in pure SQL, it would look something like this: DELETE companies_groups FROM companies_groups, groups WHERE

SQL: Update with value from other table depending on timestamp

由 送分小仙女□ 提交于 2019-12-13 04:19:35
问题 I have the following problem: I want to update the column "UPDATE_VALUE" of table A with values from the column "SOURCE_VALUE" from another table B. Both tables have a timestamp column, and the value that should be updated in table A should be the one of the row of table B with the highest timestamp smaller/equal than the timestamp of the row of table A. For example: Table A: | ID | TIMESTAMP | UPDATE_VALUE | | 1 | 2010-09-23 10:00:00 | | | 2 | 2010-09-25 05:20:00 | | | 3 | 2010-09-25 18:10

SQL Insert with data from multiple tables

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-10 10:16:54
问题 I have four tables: Messages, MessageCategory, MessageStatus and MessageLevel. MessageCategory, MessageStatus and MessageLevel all just have three fields: Identity (primary key), Code and Description. Messages refers to these three fields and has a few other data fields, including Identity (primary key) MessageText and Order. The Identity fields are auto-incremented fields. I now need to write an SQL script to add some default data to all four tables. Problem is, I need to create a script

mysql - Select all from one table and one column form another where $var is found

由 老子叫甜甜 提交于 2019-12-08 02:11:48
问题 Ooooookay. I have two tables client and users. Both have AUTO_INCREMENT id but client table has credid-column whis is foreign key and references to users table's id. I want to prepare a PHP PDO statement that fetches all columns from client-table and only username-column from users-table where client table's column credid = :var and user table's column id = :var So far I have something like this and it is not working $userid = $_SESSION['id']; //echoes a number $STH = $DBH->prepare("SELECT *

Django - Alternative to multi-table inheritance in Appengine

由 一笑奈何 提交于 2019-12-07 20:55:59
问题 I'm developing a Django application on Google Appengine, and I came across a db design problem where multi-table inheritance seems to be the best solution. Unfortunately, however, multi-table inheritance is not supported on Appengine because it requires JOINs. I'm looking for an alternative solution that meets the following requirements: ** See updates at bottom ** There are 3 different user types, or profiles: Business (i.e. owner) Employee Client These profiles share certain attributes, but

SugarORM query from multiple tables?

由 旧城冷巷雨未停 提交于 2019-12-07 16:11:57
问题 I am using SugarORM for my Android application. In my project I have couple of tables and I was wondering is there a way to to join them into another Class Object that has columns from multiple tables? If yes, then example would be very helpful. 回答1: SugarORM provides a Query Builder object for simple queries. Since it doesn't provide supporto for joins, you can directly execute a raw query and store the result into an object created ad-hoc. So, build your custom raw query renaming the fields

mysql - Select all from one table and one column form another where $var is found

由 瘦欲@ 提交于 2019-12-06 07:17:26
Ooooookay. I have two tables client and users. Both have AUTO_INCREMENT id but client table has credid-column whis is foreign key and references to users table's id. I want to prepare a PHP PDO statement that fetches all columns from client-table and only username-column from users-table where client table's column credid = :var and user table's column id = :var So far I have something like this and it is not working $userid = $_SESSION['id']; //echoes a number $STH = $DBH->prepare("SELECT * FROM client WHERE credid = :id AND username FROM users WHERE id = :id"); $credentials = array( ':id' =>

Django - Alternative to multi-table inheritance in Appengine

由 為{幸葍}努か 提交于 2019-12-06 05:57:31
I'm developing a Django application on Google Appengine, and I came across a db design problem where multi-table inheritance seems to be the best solution. Unfortunately, however, multi-table inheritance is not supported on Appengine because it requires JOINs. I'm looking for an alternative solution that meets the following requirements: ** See updates at bottom ** There are 3 different user types, or profiles: Business (i.e. owner) Employee Client These profiles share certain attributes, but also have unique attributes for their respective types. For example, all profiles have a contact email

SQL Insert with data from multiple tables

由 空扰寡人 提交于 2019-12-06 00:23:08
I have four tables: Messages, MessageCategory, MessageStatus and MessageLevel. MessageCategory, MessageStatus and MessageLevel all just have three fields: Identity (primary key), Code and Description. Messages refers to these three fields and has a few other data fields, including Identity (primary key) MessageText and Order. The Identity fields are auto-incremented fields. I now need to write an SQL script to add some default data to all four tables. Problem is, I need to create a script which will be sent to a customer who will then execute this script. I cannot write a bit more intelligent

SugarORM query from multiple tables?

由 泄露秘密 提交于 2019-12-05 18:21:19
I am using SugarORM for my Android application. In my project I have couple of tables and I was wondering is there a way to to join them into another Class Object that has columns from multiple tables? If yes, then example would be very helpful. SugarORM provides a Query Builder object for simple queries. Since it doesn't provide supporto for joins, you can directly execute a raw query and store the result into an object created ad-hoc. So, build your custom raw query renaming the fields in the SELECT part CustomOBJ.executeQuery("SELECT tableA.fieldA as field1, tableA.fieldB as field2, tableB
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