sqlite tutorial ios

This week is busy, a few days ago to 11 o'clock, the basic is home is about 12 points (a little complaining about, free overtime, what is free, is any compensation, such as take some, overtime pay, meal supplement and other benefits, is not a bit) because the app to go online! App on-line, you can also spare some time to organize their own things, ready to spend a week to tell about the iOS data storage way. This article is mainly about the use and en

Trim (class_name) from T_classReplaceSelect Replace (class_name,' C ',' O ') from T_class// length ( space also count length )Select Length (class_name) from T_class// Date functionSelect Date () from T_classSelect DateTime () from T_class// judged to be emptySELECT * from T_class where class_name is nullSortSELECT * from T_class ORDER BY class_id Desc(reverse)SELECT * from T_class ORDER by class_id ASC ( Positive order,ASC can save default positive order )@endiOS UI Database

This problem has been clarified.I have discussed this issue a lot abroad. For details, refer Http://ablogontech.wordpress.com/2009/07/13/using-a-pre-populated-sqlite-database-with-core-data-on-iphone-os-3-0/ In addition, Apple's official explanation of this: http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdFAQ.html how do I initializeStore with default data? This section.The above articles are summarized as fo

Add, delete, modify, and query IOS sqlite Databases1. Introduction: simple encapsulation of the sqlite database operation class BaseDB is used to add, delete, modify, and query sqlite. before using it, import libsqlite3.0.dylib library 2. BaseDB. h. //// BaseDB. h // SqliteDemo /// Created by Zhao Chao on 14-8-26. // C

Use SQLite in iOS to process data. If you already know about SQL, you can easily master the operation of the SQLite database. iOS for database operations: Add, delete, find, modify the details are as follows: First you need to create a database: The database for this program is a micro-database written in a plugin in

OverviewThis chapter is a brief illustration of the use of SQLite to persist data in iOS development, using a method that is basically consistent with the use of SQLite in C + +.results show(actually nothing to see)Process Overview1. Because the use of the previous project, so the main need to drag two more buttons, almost.2. Because you want to use

IOS sqlite database operations. Steps: First join the sqlite Development Library libsqlite3.dylib, Create or open a database, Create a data table, Insert data, Query and print data1. Create a project sqliteDemo and add the library libsqlite3.dylib that uses sqlite. 2. sqlite

IOS sqlite and iossqliteIOS-SQL addition, deletion, search, and modification IOS database operations: add, delete, search, and modify First, you need to create a database: the database of this program is a trace database written in the plug-in of Firefox browser. Steps for Firefox to find SQLite Manager: Step 1: Find t

IOS UIPickView + sqlite select all cities in China, uipickviewsqlite1. Case Description: by reading files, all Chinese cities are written into the sqlite database. Now UIPickView is used to select all Chinese cities, as shown below:2. For the city object model, see http://blog.csdn.net/whzhaochao/article/details/42569145. The city model objects are as follows: //

IOS SQLite syntax basics and iossqlite syntax Sharing the basic knowledge of SQLite statements is a basic part. It only involves four syntaxes: "add", "delete", "modify", and "query. table links and other content are not involved. I will update the table link later. Github has an SQL Demo, including add, delete, modify, query. UI: url: ---> https://github.com/huy

SQLite (http://www.sqlite.org/docs.html) is a lightweight relational database. SQLite was originally designed for embedded systems. It occupies a very small amount of resources. In embedded devices, only a few hundred KB of memory is required, it is currently applicable to Android, IOS, Windows Phone, and other smartphones. When using

This article mainly introduces a simple tutorial on using SQLite in Python. as an embedded database, SQLite is embedded in Python versions of previous generations. For more information, see SQLite as an embedded database, its database is a file. Since SQLite is written in C

Access the SQLite database by using the Qt5 iOS app, qt5sqlite Development Environment:MacOS 10.12.1Xcode 8.1Qt 5.8 iPhone 6 S + iOS 10.1.1 Source code:I specified the database name in the Qt program to create a database. It runs normally in Win10, Android, and macOS, but an error is reported on the Apple mobile phone. QSqlDatabase db; db. setDatabaseName ("farme

IOS database SQLiteSQLite is a lightweight embedded database. Android and iOS use SQLite databases. Its features: it occupies very low resources. In embedded devices, it may only require several hundred KB of memory. It processes faster than MySQL and PostgreSQL, two famous databases. It is a C language framework with strong cross-platform performance. To use SQL

your own source code Implement the encryption and decryption interface reserved in the source code 2. Use SQLCipher The source code is here The usage of step by step is here. Note that the underscores of several Macros in the article are not added. Do not copy and paste them blindly. After the SQLCipher source code is compiled in the previous step, there will be an sqlite command line program in the directory. You can use this program to encrypt the

Andage: (int) Age Andtel: (NSString *) tel{NSString* Insert=[nsstring stringWithFormat:@"INSERT INTO T_person (Name,age,tel) VALUES ('%@ ',%d, '%@ ')", Name,age,tel]; [Self _execsql:insert andtip:@"Insert Operation"]; }/** * Perform database operations * * @param SQL to execute the SQL * @param tip to perform the action title*/- (void) _execsql: (NSString *) SQL Andtip: (NSString *) tip{Char*result; if(Sqlite_ok==sqlite3_exec (SQLITE, SQL. Utf8string

); } Andobjects:nil];}//Modify Table Statements- (void) altertable{NSString*sql =@"ALTER TABLE teacher add column pwd integer"; if([Qysqlitemanager altertablewithsqlstring:sql]) {NSLog (@"Modification succeeded"); }}//Update DATA Statement- (void) updatetable{NSString*sql =@"Update teacher Set name =? where id =?"; if([Qysqlitemanager Updatetablewithsqlstring:sql andarray:@[@"Xiao Ming",@ the]]) {NSLog (@"Update Successful"); }}For the type of data returned by the query statement, students who n

) { //4> Note: The extracted data can be encapsulated into the set of alternate int id=sqlite3_column_int (stmt,0); Const unsigned char *name=sqlite3_column_text (stmt, 1); int Age=sqlite3_column_int (stmt, 2); Const unsigned char *tel=sqlite3_column_text (stmt, 3); NSString * names=[nsstring stringwithutf8string: (const char *) name]; NSString * tels=[nsstring stringwithutf8string: (const char *) Tel]; NSLog

1. What is Fmdb?Fmdb is a SQLite database under the iOS platform, except that it is an OC-style SQLite statement that encapsulates the C language and is used more object-orientedAdvantages of 2.FMDB: 1. Use more object-oriented; 2. Compared with Apple's own Core data management tool is more lightweight, more flexible, and fmdb support cross-platform; 3. Provide m

copies one to the result. (A B) will be 12, i.e. 0000 1100 | If it exists in either operand, the binary OR operator copies one into the result. (A | B) will get 61, i.e. 0011 1101 ~ The binary complement operator is a unary operator with a "flip" bit effect. (~a) will get-61, which is 1100 0011,2 of the complement form, signed binary number. Binary left shift operator. The value of the left operand moves the number of