error while executing query foreign key constraint failed
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Foreign Key Constraint Failed (code 787)
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the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up SQLite Foreign Key Constraint Failed android sqlite foreign key (code 787) up vote 1 down vote favorite 1 I ran into the Foreign Key Constraint Failed (code 787) error when I tried to upgrade my database. The only change I did was try to add a 4th entry to my InsertStatus. I looked around and I read that using ON DELETE CASCADE should solve my problem so I tried placing it at all my FK sqlite constraint references and tried again but still the same problem. Logcat points to my onUpgrade and all the DROP TABLES in it ( i tried removing it one at a time to see which ones were bad and apparently all of them were ). Am I using ON DELETE CASCADE wrong? Or is it something else in my code? InsertStatus void InsertStatus(SQLiteDatabase db) { ContentValues cv = new ContentValues(); cv.put(colStatusID, 0); cv.put(colStatClass, "Active"); db.insert(statTable, colStatusID, cv); cv.put(colStatusID, 1); cv.put(colStatClass, "Settled"); db.insert(statTable, colStatusID, cv); cv.put(colStatusID, 2); cv.put(colStatClass, "Terminated"); db.insert(statTable, colStatusID, cv); cv.put(colStatusID, 3); cv.put(colStatClass, ""); db.insert(statTable, colStatusID, cv); } DatabaseHelper db.execSQL("CREATE TABLE " + termsTable + " (" + colTermsID + " INTEGER PRIMARY KEY , " + colTermsClass + " TEXT)"); db.execSQL("CREATE TABLE " + periodTable + " (" + colPeriodID + " INTEGER PRIMARY KEY , " + colPeriodClass + " TEXT)"); db.execSQL("CREATE TABLE " + statTable + " (" + colStatusID + " INTEGER PRIMARY KEY , " + colStatClass + " TEXT)"); db.execSQL("CREATE TABLE " + accountsTable + " (" + colID + " INTEGER PRIMARY KEY AUTOINCREMENT, " + colName + " TEXT, " + colAmount + " Integer, " + colPto Foreign Key Constraints 2. Enabling Foreign Key Support 3. Required and Suggested Database Indexes 4. Advanced Foreign Key Constraint Features 4.1. Composite Foreign Key Constraints 4.2. Deferred
Sqlite Foreign Key Constraint Not Enforced
Foreign Key Constraints 4.3. ON DELETE and ON UPDATE Actions 5. CREATE, sqlite check constraint example ALTER and DROP TABLE commands 6. Limits and Unsupported Features Overview This document describes the support for SQLDb Browser For Sqlite Foreign Key
foreign key constraints introduced in SQLite version 3.6.19 (2009-10-14). The first section introduces the concept of an SQL foreign key by example and defines the terminology used for the http://stackoverflow.com/questions/29341380/sqlite-foreign-key-constraint-failed-code-787 remainder of the document. Section 2 describes the steps an application must take in order to enable foreign key constraints in SQLite (it is disabled by default). The next section, section 3, describes the indexes that the user must create in order to use foreign key constraints, and those that should be created in order for foreign key constraints to https://www.sqlite.org/foreignkeys.html function efficiently. Section 4 describes the advanced foreign key related features supported by SQLite and section 5 describes the way the ALTER and DROP TABLE commands are enhanced to support foreign key constraints. Finally, section 6 enumerates the missing features and limits of the current implementation. This document does not contain a full description of the syntax used to create foreign key constraints in SQLite. This may be found as part of the documentation for the CREATE TABLE statement. 1. Introduction to Foreign Key Constraints SQL foreign key constraints are used to enforce "exists" relationships between tables. For example, consider a database schema created using the following SQL commands: CREATE TABLE artist( artistid INTEGER PRIMARY KEY, artistname TEXT ); CREATE TABLE track( trackid INTEGER, trackname TEXT, trackartist INTEGER -- Must map to an artist.artistid! ); The applications using this database are entitled to assume that for each row in the track table there exists a corresponding row in the artist table. After all, the comment in the declaration says so. Unfortunately, if a user editsConnectors More MySQL.com Downloads Developer Zone Section Menu: Documentation Home MySQL 5.7 Reference Manual Preface and Legal Notices General Information Installing and Upgrading MySQL http://dev.mysql.com/doc/en/innodb-foreign-key-constraints.html Using MySQL as a Document Store Tutorial MySQL Programs MySQL Server http://www.w3resource.com/sqlite/sqlite-constraint.php Administration Security Backup and Recovery Optimization Language Structure Globalization Data Types Functions and Operators SQL Statement Syntax The InnoDB Storage Engine Introduction to InnoDB Benefits of Using InnoDB Tables Best Practices for InnoDB Tables Checking InnoDB Availability Testing and Benchmarking with InnoDB Turning Off InnoDB foreign key InnoDB and the ACID Model InnoDB Multi-Versioning InnoDB Architecture Buffer Pool Change Buffer Adaptive Hash Index Redo Log Buffer System Tablespace InnoDB Data Dictionary Doublewrite Buffer Undo Log File-Per-Table Tablespaces General Tablespaces Undo Tablespace Temporary Tablespace InnoDB Temporary Table Undo Logs Redo Log Group Commit for Redo Log Flushing InnoDB Locking and Transaction Model InnoDB foreign key constraint Locking InnoDB Transaction Model Transaction Isolation Levels autocommit, Commit, and Rollback Consistent Nonlocking Reads Locking Reads Locks Set by Different SQL Statements in InnoDB Phantom Rows Deadlocks in InnoDB An InnoDB Deadlock Example Deadlock Detection and Rollback How to Minimize and Handle Deadlocks InnoDB Configuration InnoDB Startup Configuration Configuring InnoDB for Read-Only Operation InnoDB Buffer Pool Configuration The InnoDB Buffer Pool Configuring InnoDB Buffer Pool Size Configuring Multiple Buffer Pool Instances Making the Buffer Pool Scan Resistant Configuring InnoDB Buffer Pool Prefetching (Read-Ahead) Configuring InnoDB Buffer Pool Flushing Fine-tuning InnoDB Buffer Pool Flushing Saving and Restoring the Buffer Pool State Monitoring the Buffer Pool Using the InnoDB Standard Monitor Configuring the Memory Allocator for InnoDB Configuring InnoDB Change Buffering Configuring the Change Buffer Maximum Size Configuring Thread Concurrency for InnoDB Configuring the Number of Background InnoDB I/O Threads Configuring the InnoDB Master Thread I/O Rate Configuring Spin Lock Polling Configuring InnoDB Purge Scheduling Configuring Optimizer Statistics for InnoDB Configuring Persistent Optimizer Statistics Parameters Configuring Non-Persiste
Google Plus API Youtube API Firebug WebP Web Dev Tools Exercises HTML CSSJavaScript C Programming Exercise C# Sharp Exercise Java PHPPython jQuery jQuery-UI MySQLSQLPostgreSQL ExercisesSQLite Exercises MongoDB Exercises Twitter Bootstrap ExamplesEuler Project Posts Wordpress Webhosting jQuery JavaScript CSS3 MySQL SQL HTML5 PHP Linux Featured: Python Exercises,C Programming Exercises,SQL Exercises,MySQL Exercises, Home SQLite3 Home Download, installation and getting started DOT(.) Commands Attach, Detach Database Data Types Create, Alter, Drop tableConstraint Create, Alter, Drop index SELECT statement Operators Insert Update Delete Union Collating Sequences Aggregate Functions Core Functions Date and Time Functions Create, Drop views JOINS Subqueries Triggers SQLite Exercises ..More to come.. SQLite Constraint Posted on January 28 2015 20:20:17 (UTC/GMT +8 hours) What is Constraint ? The CONSTRAINTS are an integrity which defines some conditions that restricts the column to contain the true data while inserting or updating or deleting. We can use two types of constraints, that is column level or table level constraint. The column level constraints can be applied only on a specific column where as table level constraints can be applied to the whole table. The following column constraints that should be enforced when data is inserted: NOT NULL PRIMARY KEY UNIQUE CHECK FOREIGN KEY Table of contents Constraint PRIMARY KEY COMPOSITE PRIMARY KEY UNIQUE CHECK FOREIGN KEY COMPOSIT FOREIGN KEY ON DELETE NO ACTION CASCADE RESTRICT Constraint The CONSTRAINTS are an integrity which defines some conditions that restricts the column to contain the true data while inserting or updating or deleting. We can use two types of constraints, that is column level or table level constraint. The column level constraints can be applied only on a specific column where as table level constraints can be applied to the whol