mysql - Need a SQL command for these tables -

-

i have following 2 tables (student , attendance):

mysql> describe student; +----------------------+--------------+------+-----+---------+----------------+ | field                | type         | null | key | default |          | +----------------------+--------------+------+-----+---------+----------------+ | student_id           | int(11)      | no   | pri | null    | auto_increment | | student_email        | varchar(255) | yes  |     | null    |                | | student_phone_number | varchar(255) | yes  |     | null    |                | | parent_first_name    | varchar(255) | no   |     | null    |                | | parent_last_name     | varchar(255) | no   |     | null    |                | | parent_email         | varchar(255) | no   |     | null    |                | | parent_phone_number  | varchar(255) | no   |     | null    |                | | first_name           | varchar(255) | no   |     | null    |                | | last_name            | varchar(255) | no   |     | null    |                | | days_absent          | int(11)      | yes  |     | null    |                | | days_tardy           | int(11)      | yes  |     | null    |                | | class_id             | int(11)      | no   | mul | null    |                | +----------------------+--------------+------+-----+---------+----------------+   mysql> describe attendance; +-----------------+------------+------+-----+---------+-------+ | field           | type       | null | key | default | | +-----------------+------------+------+-----+---------+-------+ | student_id      | int(11)    | no   | pri | null    |       | | class_id        | int(11)    | no   | pri | null    |       | | attendance_date | date       | no   | pri | null    |       | | absent          | tinyint(1) | yes  |     | null    |       | | tardy           | tinyint(1) | yes  |     | null    |       | | note            | text       | yes  |     | null    |       | +-----------------+------------+------+-----+---------+-------+

i want check attendance , email of children absent or tardy day. there sql statement can use can, example, select students attendance absent/tardy value = 1, using student_id specified in attendance table, pull student info student table attendance.student_id = student.student_id?

just try exists

select student_email,student_phone_number student std exists( select 1 attendance atd std.student_id = atd.student_id , (atd.absent =1 or atd.tardy =1) )

just make sure select info student table , exists filter in attendance talbe. condition student_id.

also if need info attendance talbe, use join.


Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

reactjs - React router and this.props.children - how to pass state to this.props.children -

-
i'm using react-router first time , don't know how think in yet. here's how i'm loading components in nested routes. entry point .js reactdom.render( <router history={hashhistory} > <route path="/" component={app}> <route path="models" component={content}> </route> </router>, document.getelementbyid('app') ); app.js render: function() { return ( <div> <header /> {this.props.children} </div> ); } so child of app content component sent in. i'm using flux , app.js has state , listens changes, don't know how pass state down this.props.children. before using react-router app.js defines children explicitly, passing state natural don't see how now. using couple of react helper methods can add state, props , whatever else this.props.children render: function() { var children = react.ch...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more