Equals_Operator :=expression==expression. Remarks expression Is any valid expression. If the expressions are not of the same data type, the data type for one expression must be implicitly convertible to the data type of the other. Return Types ...
Operator 用于声明支持数据表字段的聚合计算(原子指标),如 sum、count、max 等,同时 operator 也支持配置成多个聚合计算的二次运算表达式(复合指标),比如在计算人均类指标时,其复合指标表达式为总值 / 人数。 Dimension 用于声明查询的分组维度,同时也支持虚拟列,其声明块的每个元素含义与 Metric 声明块相同。 Filter ...
The following example uses the Equals operator to return all rows in theHumanResources.Departmenttable in which the value in theGroupNamecolumn is equal to the word 'Manufacturing'. SQL -- Uses AdventureWorksSELECTDepartmentID,NameFROMHumanResources.DepartmentWHEREGroupName ='Manufacturing'; ...
Performs a logical comparison of two SqlByte structures to determine whether they are equal. C# Copy public static System.Data.SqlTypes.SqlBoolean operator ==(System.Data.SqlTypes.SqlByte x, System.Data.SqlTypes.SqlByte y); Parameters x SqlByte A SqlByte structure. y SqlByte A SqlByte ...
<= (Less Than or Equal To) <> (Not Equal To) !< (Not Less Than) != (Not Equal To) !> (Not Greater Than) Compound Logical :: (Scope Resolution) Relational operators String Operator precedence Transactions Variables Queries Statements xQuery Preuzmi PDF Learn...
▲ resource_track_level(如果设成query,则收集query级别的信息,如果设成operator,则收集所有信息,如果设成none,则以用户默认的log级别为准) ▲ resource_track_cost(设成合适的正整数。为了不影响性能,只有执行代价大于resource_track_cost语句才会被收集。该值越大,收集的语句越少,对性能影响越小;反之越小,收集的...
<= (Less Than or Equal To) <> (Not Equal To) !< (Not Less Than) != (Not Equal To) !> (Not Greater Than) Compound Logical :: (Scope Resolution) Relational operators String Operator precedence Transactions Variables Queries Statements ...
TheEXISTSoperator is used to test for the existence of any record in a subquery. TheEXISTSoperator returns TRUE if the subquery returns one or more records. EXISTS Syntax SELECTcolumn_name(s) FROMtable_name WHEREEXISTS (SELECTcolumn_nameFROMtable_nameWHEREcondition); ...
Next let's start the interactive console by using the command psql and connect to the database we just made using \c <database-name>: 接下来,让我们使用命令psql启动交互式控制台,并使用\c <database-name>连接到我们刚建立的\c <database-name> : ...
(sqlExpr.getOperator()) { case Equality: dsl.append(dslSelectSyntax.eq(fieldName, value)); break; case NotEqual: dsl.append(dslSelectSyntax.neq(fieldName, value)); break; case GreaterThan: dsl.append(dslSelectSyntax.gt(fieldName, value)); break; case GreaterThanOrEqual: dsl.append(dsl...