notes stored on android

Android System integrates a lightweight database:SQLite, so Android support for the database is very good, each application can easily use it. As an embedded database engine, SQLite is dedicated to the right amount of data access on devices with limited resources, and now mainstream mobile devices like Android, iphone and so on are using SQLite as a storage engin

Learn to Tarena gold medal lecturer Heshan, Golden Dawn technology company technical Director Chalimoux Course notes synthesis.1. What are stored procedures and functionsPut SQL statements in a collection, and then call stored procedures and functions directly to execute the SQL statements that have already been defined, and through

, view heap and thread data, screen shots of emulators or devices, and so on. Android Debug Bridge (ADB)Android Debug Bridge: It is used to install an application's. apk file to an emulator or device and access the emulator or device from the command line. can also be used to connect a standard debugger to a running The application code on the Android emulator or

trigger cascade to update the number information in the relevant score record in the SC table.Create Trigger Tri_upd_studentOn student for updateAsDeclare @oldsid char (TEN), @newsid char (10)Select @oldsid =deleted.sno, @newsid =inserted.snoFrom inserted,deleted whereInserted.sname=deleted.snameUpdate SC Set [email protected] where [email protected]--View results:Update student set sno=85001 where sno=95001 --Task 9 create instead of triggers student tables and SC tables are the relationships

containing the IF-ELSE structure, stored procedures can also contain a while loop structure, for example:DELIMITER//create PROCEDURE P4 (in n int) begindeclare I int;declare s int;set i = 1;set s = 0;while i The stored procedure calculates the summation from 1 to N, and the example of calling the stored procedure is as follows:3. View existing

[, variable_name = ' expression ...] User variables: ① user variable names usually begin with @ SELECT ' Hello World ' into @x ; SELECT @x; MySQL calls to stored procedures with Call and your procedure name and a parenthesis, enclose the parameters in parentheses as necessary, parameters include input parameters, output parameters, input and output parameters. Refer to the example above for specific invocation methods. MySQL ch

[Android Notes] Android calculates the folder size, deletes all files in the folder, and android notes 1. Get the folder size: 1/** 2 * Get the folder size 3 * @ param file File instance 4 * @ return long 5 */6 public static long getFolderSize (java. io. file file) {7 8 long

Android learning notes (1): basic concepts, android learning notes This article is referenced in Android development tutorials Notes Android concept:

write only select ' Insert Success ' because the trigger does not allow a result set to be returned.CREATE TRIGGER INSERT on Products for BEGIN SELECT'Insert success' into @info ; END ;Note: Only tables support triggers, views are unsupported, and up to 6 triggers in a table occur before or after insert/delete/update. Insert Trigger, you can refer to a virtual table named new to access the inserted row. Delete trigger, you can refer to a virtual table named old to access the

[Android Notes] use and implementation of the pull-down and refresh components and Android notes drop-down ComponentsIf you need to implement pull-down refresh in a project, you can choose from the following options:1. Use the open-source library Android-pullToRefresh.2. Use

The following describes how to call the DB2 Stored Procedure method through Lotus Notes to call the DB2 stored procedure. If you are interested in the DB2 stored procedure, take a look. Compiling DB2 stored procedures and calling DB2 sto