ifnotexists(select*fromErrorConfigwhereType='RetryWaitSeconds') begin insertintoErrorConfig(Type,Value1) values('RetryWaitSeconds','3') end 只能用: 1 2 3 insertintoErrorConfig(Type,Value1) select'RetryWaitSeconds','3' wherenotexists(select*fromErrorConfigwhereType='RetryWaitSeconds') 因为SQLite 中...
SQLite实现ifnotexist类似功能的操作 需要实现：if not exists(select * from ErrorConfig where Type='RetryWaitSeconds')begin insert into ErrorConfig(Type,Value1)values('RetryWaitSeconds','3')end 只能⽤：insert into ErrorConfig(Type,Value1)select 'RetryWaitSeconds','3'where not exists(select * from...
三、Sqlserver中: SqlServer中需要另一种写法: IF NOT EXISTS (SELECT id FROMbooksWHERE id = 1)INSERT INTO books (name) SELECT 'Songxingzhu'
SQL INSERT INTO 语法 INSERT INTO 语句可以有两种编写形式。 第一种形式无需指定要插入数据的列名，...
publicvoidAddNewPerson(stringname){intresult =0;try{// enter this lineInit();// basic validation to ensure a name was enteredif(string.IsNullOrEmpty(name))thrownewException("Valid name required");// enter this lineresult = conn.Insert(newPerson { Name = name }); ... } ... }...
if子句中的错误行是NSAsset,即注释掉。withField3: (NSString *) field3{ NSString *sql= [NSString stringWithFormat: @"CREATE TABLE IF NOT EXIST '%@' 浏览3提问于2013-01-18得票数 0 回答已采纳 1回答 更新应用程序后,应用程序在sqlite上崩溃 、、、 0x000036e3 MyApp + 9955",)- (BOOL) check...
(szEmail);printf("输入地址(回车结束):");gets(szAddress);char sql[512];sprintf(sql,"INSERT INTO addlist VALUES(null,'%s','%s','%s','%s','%s');",szName,szSex,szNum,szEmail,szAddress);int rc=sqlite3_exec(db,sql,NULL,NULL,NULL);if(rc!=SQLITE_OK){printf("出错\n");}return;...
the table to insert the row into nullColumnHack String optional; may be null. SQL doesn't allow inserting a completely empty row without naming at least one column name. If your provided initialValues is empty, no column names are known and an empty row can't be inserted. If not set...
publicintSaveCustomer(Customer customerInstance){lock(collisionLock) {if(customerInstance.Id !=0) { database.Update(customerInstance);returncustomerInstance.Id; }else{ database.Insert(customerInstance);returncustomerInstance.Id; } } } 中的代码图 11, ,而是演示如何插入或更新的客户的所有实例。
If your app needs multiple databases, LitePal support it completely. You can create as many databases as you want at runtime. For example:LitePalDB litePalDB = new LitePalDB("demo2", 1); litePalDB.addClassName(Singer.class.getName()); litePalDB.addClassName(Album.class.getName());...