2013-08-23 18:02 − 1、数组取出最大值,最小值的方式 第一种、 遍历一边数组就可以找出需要的值,基本上可以说是速度最快的算法,还不需要排序 int [] intArray = {1,3,2,4,2,5,2,6,45,7,5,86,5,45,3,867} ; int max = intArray[0]; int min =... Class Xman 0 228 Java map...
* @return A CachedRowSet containing any generated keys. */ public long executeGetGeneratedKeys(String expression) { long ret = 0; Statement statement = null; try { Class.forName(this.db_param.jdbcClass); Connection conn = DriverManager.getConnection(this.db_param.url, this.db_param.user, this...
CREATE TABLE t1 (a int, b int, c AS a/b); CREATEUNIQUE CLUSTERED INDEXIdx1 ON t1(c); INSERT INTO t1 VALUES (1, 0); ===删除索引=== drop index 表名.列名 --子查询 把一个查询的结果在另一个查询中使用就叫子查询。(将一个查询语句做为一个结果集供其他SQL语句使用) 子查询基本分类: ...
Declare@Code nvarchar(200) Declare@Valueint Set@Value=0 Select@Code=[Code],@Value=[DataNum]From[Category]Where[ClassID]=@ClassID Update[Category]Set[DataNum]=[DataNum] - @ValueWhere[ClassID]In(SelectClassIDFrom[Category]WhereLen(Code)<=Len(@Code)AndCode=Left(@Code,Len(Code))) DeleteFr...
drop database db1(db1代表数据库表，可自命名)3、说明：备份sql server ---创建备份数据的device USE master EXEC sp_addumpdevice'disk','testBack','c:\mssql7backup\MyNwind_1.dat'---开始备份 BACKUP DATABASE pubs TO testBack 4、说明：创建新表 create table tb1(Id int not null primary key,...
pool.max：连接池最⼤连接数，默认10 pool.min：连接池最⼩连接数，默认0 pool.idleTimeoutMillis：设置关闭未使⽤连接的时间，单位ms默认30000 快速开始 const sql = require('mssql') //声明插件 sql.connect(config).then(() => { return sql.query`select * from mytable where id = ${value}`...
declare@RunningOnAClusterchar(1)declare@xp_cmdshell_availablechar(1)declare@resultintset@xp_cmdshell_available='Y'set@result=0select@RunningOnACluster=casewhenconvert(int, serverproperty('IsClustered'))=1then'Y'else'N'endif(0=(selectvalue_in_usefromsys.configurationswherename='xp_cmdshell'))set@xp...
NVARCHAR(MAX), @aExists INT OUTPUT',@OldValue,@aExistsOUTPUTIF@aExists=1BEGIN--将相关的合并数据进行备份,备份表(bak_tran),此表结构应根据具体情况设计,以下只供参考。原本打算存在临时表(TempTable)SET@SQLString='SELECT ID,'''+@TableName+''','''+@ColumnName+''','''+@NewValue+''','''...
Exec sp_Executesql @sql, N'@MaxID bigint output',@MaxID output --print @MaxID Declare @IDENT_CURRENT bigint, @NewIDentity bigint, @IDENT_SEED int, @IDENT_INCR int Select @IDENT_SEED = IDENT_SEED(@TableName), --标识种子 @IDENT_INCR = IDENT_INCR(@TableName), --标识增量 ...
(MAX),@SQLIdentityOffVARCHAR(MAX);DECLARE@t_tbTABLE(TBvarchar(128),Sqlwherevarchar(1024),SN BIGINTIDENTITY(1,1))DECLARE@tbTABLE(insert_sqlVARCHAR(max),SN BIGINTIDENTITY(1,1));DECLARE@colListTABLE(colNameVARCHAR(128),colTypeVARCHAR(128),colValueLVARCHAR(120),colValueRVARCHAR(120),selCol...