Migrate database engine from MySQL to SQLite

From LemonWiki共筆
Jump to: navigation, search

Steps of migration database engine from MySQL to SQLite

Steps of migration database engine from MySQL to SQLite[edit]

  1. Migrate database data from MySQL to SQLite using the SQLite management software
  2. Modify the scripts of database connection and SQL query syntax because some MySQL functions are not compatible in SQLite
  3. Testing the scripts

Notes of modification of scripts[edit]

  • Remove database name from SQL query: SQLite will consider the database name as table name
  • In MySQL, string are able to quoted with single quote symbol ' or double quote symbol ". In SQLite the string quoted with double quote symbol will be considered as column name! It will cause the problem: "no such column: xxx"
  • Replace the following functions
    • Replace MySQL CHAR_LENGTH function with SQLite Length function[1]
    • Replace MySQL IF function with SQLite CASE function[2]
    • Replace MySQL LOCATE function[3] with SQLite INSTR CASE function[4]
-- MySQL
LOCATE(substr,str), LOCATE(substr,str,pos)

-- SQLite
INSTR(string, substring);
  • Other functions are not supported such as: SET, Truncate[5], INGORE

References[edit]