"SEMIPRODUCTCODE","PROCESSCODE","PROCESSNAME","SHIFTPRODUCTIONQTY","UNIT","SLICEQTY","SINGLEWAGESPRICE","PIECEWAGESPRICE","LABORMULTIPLE","TOTALPRICE","REMARK","CREATETIME","UPDATETIME","CREATEUSERID","UPDATEUSERID","ISDELETE" FROM "OFFER_ARTIFICIAL" WHERE ("HCODE" = BJD20231016001) ...
=Equals <>Does not equal !=Does not equal >Is greater than <Is less than >=Is greater than or equal to <=Is less than or equal to 例如: SELECTName,AgeFROMSample.PersonWHEREAge<21 SQL根据排序规则(值的排序顺序)定义了比较操作。
while (topTableFilter.next()) { // 判断是否符合 where 筛选条件 if (condition == null || Boolean.TRUE.equals(condition.getBooleanValue(session))) { Value[] row = new Value[columnCount]; // 填充select 需要的 columns ① for (int i = 0; i < columnCount; i++) { Expression expr =...
当我使用 WHERE equals 子句从我的表中搜索结果时,我得到了我希望与众不同的结果。例如,当我查找结果时,我的查询 SELECT * FROM users WHERE login="lapis"结果与 SELECT * FROM users WHERE login="lapis ". 最后的空格被忽略,这是我的代码中的问题,因为我将此查询用于我的 php 登录脚本,任何人都可以使用...
GO-- SET ANSI_NULLS to OFF and test.PRINT 'TestingSETANSI_NULLSOFF'; SET ANSI_NULLS OFF; GO DECLARE @varname int; SET @varname = NULL; SELECT a FROM t1 WHERE a = @varname; SELECT a FROM t1 WHERE a <> @varname; SELECT a FROM t1 WHERE a IS NULL; GO -- Drop table t1. ...
If either instance of SqlInt16 is null, the Value of the SqlBoolean will be Null. Remarks The equivalent method for this operator is SqlInt16.Equals(SqlInt16, SqlInt16). Applies to ProductVersions .NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6,...
Once all of the rows have been retrieved from the users table, it then runs the WHERE clause against each row and only returns rows where the first_name column value equals "John." 一旦从users表中检索了所有行,它就对每行运行WHERE子句,并且仅返回first_name列值等于“ John”的行。
WHERE CURRENT OF语句的AND子句中。 在CREATE TRIGGER语句的WHEN子句中确定何时应用触发操作代码。 谓词列表 每个谓词包含一个或多个比较操作符,可以是符号,也可以是关键字子句。 SQL支持以下比较操作符: =(equals) ,<>(does not equal),!=(does not equal),>(is greater than),>=(is greater than or equal...
所有 System.Data.SqlTypesEquals 方法都使用数据库语义计算 null 值:如果两个值中的一个或两个都为 null,则比较结果为 null。 另一方面,如果两个 Equals 都为null,则对两者使用 CLR System.Data.SqlTypes 方法将生成 true。 这反映了使用实例方法(如 CLR String.Equals 方法)和使用静态/共享方法 (SqlString....
The following example uses the Equals operator to return all rows in the HumanResources.Department table in which the value in the GroupName column is equal to the word 'Manufacturing'.SQL Copy -- Uses AdventureWorks SELECT DepartmentID, Name FROM HumanResources.Department WHERE GroupName = '...