PRAGMA foreign_keys=false;-- --- Table structure for sys_user-- ---DROPTABLEIFEXISTS"sys_user";CREATETABLE"sys_user" ( "id"bigint(11)NOTNULL, "role_id"bigint(11)NOTNULL, "user_name"varchar(255)NOTNULL, "user_pass"varchar(64)NOTNULL, "nick_name"varchar(255)NOTNULL, "register_ti...
sqlite3 amazing-endemic-species.db"DROP TABLE IF EXISTS aes;" 退出SQLite终端 .quit 或 .exit 先写这么多吧。
alter table表名character set字符集名称; 3.添加一列 alter table表名add列名数据类型; 4.修改列名称类型 alter table表名change列名新列别新数据类型; alter table表名modify列名新数据类型; 5.删除列 alter table表名drop列名; 4.D(Delete):删除 *drop table表名; *drop table if exists表名; *客户端图...
DELETE QUERY OR DROP TABLE AND RE-GENERATE THE TABLE? 及关于删除sqlite里面所有数据,用drop并重建比delete all sqlite里面的数据更加有效率 itismore efficienttodroptableandre-createit;andyes, You can use "IF EXISTS"inthiscase DELETEFROMwill cause SQLitetovisit individualrowsunless thoserowshave triggers...
)'''try:conn=sqlite3.connect('test.db')cu=conn.cursor()cu.execute(create_table_sql)print'table create successful'except sqlite3.Error,why:print'create table failed:'+why.args[0] 2. 删除table 删除表,删除失败会抛出异常。 try:#如果存在表先删除drop_table_sql='DROP TABLE IF EXISTS student...
Log("Copied db file");}//Now you can do the database operation//open db connectionvarconnection=newSqliteConnection(dbDestination);connection.Open();varcommand=connection.CreateCommand();// Drop the table if it already exists.command.CommandText="DROP TABLE IF EXISTS existing_individual;";command...
create table table_name(field1 type1, field2 type1, ...); table_name是要创建数据表名称,fieldx是数据表内字段名称,typex则是字段类型。 如:CREATE TABLE IF NOT EXISTS "itm_session" ("sessionID" varchar(40) NOT NULL PRIMARY KEY, "clientIP" varchar(32) NOT NULL, "created" datetime NOT ...
db.execSQL(“drop table if exists Course”); // 创建新的表 onCreate(db); } 下面来实现数据库的增、删、改、查四大功能。要在数据库中插入一行,首先获取SQLiteDatabase的对象db,同时创建ContentValues对象values。values中存放要写入数据库的信息,然后用SQLiteDatabase的insert函数向表中添加数据。
db.sqlBatch([ 'DROP TABLE IF EXISTS MyTable', 'CREATE TABLE MyTable (SampleColumn)', [ 'INSERT INTO MyTable VALUES (?)', ['test-value'] ], ], function() { db.executeSql('SELECT * FROM MyTable', [], function (resultSet) { console.log('Sample column value: ' + resultSet.row...
DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.mouday.dao.PersonDao"><update id="dropTable">drop table if exists person;</update><update id="createTable">CREATE TABLE IF NOT EXISTS `person` (`id` ...