SELECT DISTINCT 关键字 SQL的SELECT DISTINCT语句用于选择表中的不同(唯一)值。这在某些情况下非常有用,因为数据库表中的某些列可能包含大量重复值,而您只关心获取这些值的不同实例。 SELECT DISTINCT的基本语法如下: 代码语言:sql AI代码解释 SELECTDISTINCTcolumn1,column2,...FROMtable_name; 其中,column1,colum...
=Code.RemoveDuplicates(Parameters!DummyParameter) Note: theDummyParameteris name of the dummy parameter. 5. Go toDefault Valuestab, check itemSpecify values 6. ClickAddto add a value, type the following expression in theValuetextbox. If Allow multip...
因为规定要求 select 列表的字段非聚合字段,必须出现在group by后面进行分组。 报错:Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column '数据库.表.字段' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_f...
AI代码解释 INSERTINTObookshelf(book_id,book_name,book_type,author,intime)VALUES(1,'飘','长篇小说','玛格丽特·米切尔',SYSDATE);INSERTINTObookshelf(book_id,book_name,book_type,author,intime)VALUES(2,'倾城之恋','爱情小说','张爱玲',SYSDATE);INSERTINTObookshelf(book_id,book_name,book_type,aut...
OF TSEQUAL DELETE OFF UNION DENY OFFSETS UNIQUE DESC ON UNPIVOT DISK OPEN UPDATE DISTINCT OPENDATASOURCE UPDATETEXT DISTRIBUTED OPENQUERY USE DOUBLE OPENROWSET USER DROP OPENXML VALUES DUMP OPTION VARYING ELSE OR VIEW END ORDER WAITFOR ERRLVL
SQL_AF_DISTINCTSQL_AF_MAXSQL_AF_MINSQL_AF_SUMSQL-92 入口级别一致性驱动程序将始终按支持返回所有这些选项。 SQL_ALTER_DOMAIN 3.0 SQLUINTEGER 位掩码,枚举数据源支持的 SQL-92 中 ALTER DOMAIN 语句中的子句。 SQL-92 完全兼容级别的驱动程序将始终返回所有位掩码。 返回值为“0”表示 不支持 ALTER ...
getdate(), 1); -- 批量插入 SQLServer一次批量插入最多1000行左右 insert into dotnetcrazy.dbo.users(username, password, email, tel, usercode, createtime, updatetime, datastatus) values ('xxx', '7c4a8d09ca3762af61e59520943dc26494f8942b', 'xxx@qq.com', '13738002038', newid(), getdate...
values(1,1,'关羽','男','1988-8-8',12000,'13985745871','荆州',getdate()) insertintoPeople(DepartmentId,RankId,PeopleName,PeopleSex,PeopleBirth,PeopleSalary,PeoplePhone,PeopleAddress,PeopleAddTime) values(2,1,'张飞','男','1990-8-8',8000,'13535987412','宜昌',getdate()) ...
报错:null value in column "xxx" violates not-null constraint 问题原因:违反非空约束,NOT NULL的列写入了NULL值。 解决方法:去掉NULL的脏数据后再进行写入。 ERRCODE_UNDEFINED_TABLE 报错:Dispatch query failed: Table not found 问题原因:表不存在,一般出现在表刚刚创建未更新元数据或者Query执行过程中,表执行...
The ROWGUIDCOL property doesn't enforce uniqueness of the values stored in the column. It also doesn't automatically generate values for new rows inserted into the table. To generate unique values for each column, use the NEWID function on INSERT statements. A default value can be specified; ...