四种状态:由上面两种属性延伸出四种状态 下面这些语句是等效的: CREATETABLEt (tsTIMESTAMP);CREATETABLEt (tsTIMESTAMPDEFAULTCURRENT_TIMESTAMPONUPDATECURRENT_TIMESTAMP);CREATETABLEt (tsTIMESTAMPONUPDATECURRENT_TIMESTAMPDEFAULTCURRENT_TIMESTAMP); ts TIMESTAMP DEFAULT 0 //只是给一个常量(注:0000-00-00 00:0...
最近在记录一些简单的结构化日志信息时,用到了sqlite3数据库(保存的信息比较简单,用Mysql,SQL Server,Postgres这些数据库有点小题大做)。以前开发系统...
NSString*sql1 = @"CREATE TABLE IF NOT EXISTS ac_mode_info (_id integer primary key autoincrement, ac_mode_name varchar, on_off integer, speed integer, work_mode integer, temp integer)"; [shareDataBaseexecuteUpdate:sql1]; NSString*sql2 = @"CREATE TABLE IF NOT EXISTS ac_mode_inner_ac...
CREATE TABLE [dbo].[LOGR]( [USERID] [varchar](50) NULL, [STRSQL] [varchar](max) NULL, [DATE] [varchar](8) NULL, [TIME] [varchar](8) NULL, [TABLNM] [nvarchar](50) NULL ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] 1. 2. 3. 4. 5. 6. 7. 触发器 CREATE TRIGGER [dbo].[KNMT...
sqlite>CREATETABLEIFNOTEXISTS position_info ( (x1...> idINTEGERNOTNULLPRIMARYKEY, (x1...> equityREALNOTNULL, (x1...> profit_lossREALNOTNULL, (x1...> created_at TEXTNOTNULL, (x1...> updated_at TEXTNOTNULL (x1...> );
sqlite> CREATE TABLE COMPANY( ...> ID INT PRIMARY KEY NOT NULL, ...> NAME TEXT NOT NULL, ...> AGE INT NOT NULL, ...> ADDRESS CHAR(50), ...> SALARY REAL ...> ); 再创建一个 CLASS 表,以便后续部分使用: sqlite> CREATE TABLE CLASS( ...> ID INT PRIMARY KEY NOT NULL, .....
SQLite CREATE TABLE 语句: CREATE TABLE table_name(column1 datatype,column2 datatype,column3 datatype,...columnN datatype,PRIMARY KEY(oneormore columns)); SQLite CREATE TRIGGER 语句: CREATE TRIGGER database_name.trigger_name BEFORE INSERT ON table_name FOR EACH ROWBEGINstmt1;stmt2;...END;...
moveToFirst()移动指针到第一行 moveToLast()移动指针到最后一行 moveToNext()移动指针到下一行 具体使用可以参考开发手册 三、示例 创建表语句: create table user(id int,name varchar(20)) 查询 SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(“/data/data/study.sqlite/databases/sqlite_joyous_db”,...
ATTACHDATABASEBEGINTRANSACTIONcommentCOMMITTRANSACTIONCOPYCREATEINDEXCREATETABLECREATETRIGGERCREATEVIEWDELETEDETACHDATABASEDROPINDEXDROPTABLEDROPTRIGGERDROPVIEWENDTRANSACTIONEXPLAINexpressionINSERTONCONFLICTclausePRAGMAREPLACEROLLBACKTRANSACTIONSELECTUPDATE SQLite 数据类型 ...
数据操作语言 (DML) : SELECT、INSERT、DELETE、UPDATE 数据定义语言 (DDL) : CREATE TABLE 1.5 ...