SQLite 2.7.6 is often faster (sometimes more than twice as fast) than MySQL 3.23.41 for most common operations. SQLite does not execute CREATE INDEX or DROP TABLE as fast as the other databases. But this is not seen as a problem because those are infrequent operations. ...
CREATE and DROPUsing CREATE or DROP to create or destroy a table or index is really the same as doing an INSERT or DELETE from the special "sqlite_master" table, at least from the point of view of the VDBE. The sqlite_master table is a special table that is automatically created for...
Fix a crash issue when creating a new table through UI.5.7.0 - May 16, 2022The speed of loading databases has been significantly improved. Data Editor, upgrade show blob as image to show blob as preview. So blob data can not only display as image if possible, but also can display as...
To create an index on an expression, you can use theCREATE INDEXstatement and specify the expression as the index key. For example, to create an index on the lowercase version of the “email” column in the “users” table, you could use the following SQL statement: CREATE INDEX idx_user...
static void NativeMain() { // Open the database--db is our "handle" to it IntPtr db; if (SQLiteNative.sqlite3_open(@"cities.sqlite", out db) == SQLiteNative.SQLITE_OK) { // Prepare a simple DDL "CREATE TABLE" statement string query = "CREATE TABLE City " + "(name TEXT, sta...
# 需要导入模块: import sqlite3 [as 别名]# 或者: from sqlite3 importRow[as 别名]def__init__(self, tableName, attribIndex, keyAttribute='unvocalized'):""" initialisation of dictionary from a data dictionary, create indexes to speed up the access. ...
# Create anewdatabasefile:db=sqlite3.connect("voters.sqlite")# Load theCSVinchunks:forcinpd.read_csv("voters.csv",chunksize=1000):# Append all rows to anewdatabasetable,which # we name'voters':c.to_sql("voters",db,if_exists="append")# Add an index on the'street'column:db.execute...
sqlite3在D语言下之代码流畅体验 1//Open a database in memory.2Database db;3try4{5db = Database(":memory:");6}7catch(SqliteException e)8{9//Error creating the database10assert(false,"Error:"~e.msg);11}1213//Create a table.14try15{16db.execute(17"CREATE TABLE person (18id ...
Q_DECLARE_METATYPE(Records)constQString CREATE_RECORDS_TABLE ="create table Records (id INTEGER PRIMARY KEY AUTOINCREMENT,""path TEXT NOT NULL, type INTEGER NOT NULL, channel INTEGER NOT NULL,""resX INTEGER NOT NULL, resY INTEGER NOT NULL, speed REAL NOT NULL,""hv INTEGER, multiple INTEGER...
try{SQLite::Databasedb("transaction.db3", SQLite::OPEN_READWRITE|SQLite::OPEN_CREATE); db.exec("DROP TABLE IF EXISTS test");// Begin transactionSQLite::Transactiontransaction(db); db.exec("CREATE TABLE test (id INTEGER PRIMARY KEY, value TEXT)");intnb = db.exec("INSERT INTO test VALU...