Unlike other programming languages, there is no Boolean type in Standard SQL. This article will cover how we can execute a Boolean type in various SQL database engines. Which Database Engines Support Boolean? The Boolean data type is not available natively in Standard SQL. However, various data...
The boolean data type that is common in other programming languages is not always available in SQL. PostgreSQL has a boolean data type, and other database vendors allow for other methods for capturing the true/false values used for booleans. If you want to get an easy reference PDF for all...
public struct SqlBoolean : IComparable, IEquatable<System.Data.SqlTypes.SqlBoolean>, System.Data.SqlTypes.INullable, System.Xml.Serialization.IXmlSerializable继承 Object ValueType SqlBoolean 实现 INullable IComparable IXmlSerializable IEquatable<SqlBoolean> 注解...
ValueType SqlBoolean 実装 INullableIComparableIXmlSerializableIEquatable<SqlBoolean> 注釈 0 以外の値は 1 として解釈されます。 SqlBoolean構造体と標準のブール値の主な違いは、標準ブール値には、trueとfalseの 2 つの可能な値がある場合、SqlBoolean構造体には、True、False、またはNullの 3 つの可...
GetXsdType 返回指定的 XmlSchemaSet 的XML 架构定义语言 (XSD)。 GreaterThan 对SqlBoolean 的两个实例进行比较,以确定第一个实例是否大于第二个实例。 GreaterThanOrEquals 对SqlBoolean 的两个实例进行比较,以确定第一个实例是否大于或等于第二个实例。 LessThan 对SqlBoolean 的两个实例进行比较,以确定第一个...
声明Protected Function BindString ( _ parameterName As String, _ parameterValue As String, _ maxLength As Integer, _ allowNull As Boolean, _ dbType As SqlDbType _ ) As SqlParameter 参数parameterName 类型:System.String 参数的名称在语句中。parameter...
-- 复合类型包含:PL/SQL记录、PL/SQL表 -- 1.标量类型(scalar)==>常用类型,数据库中的预定义类型的变量 -- 定义标量的语法:variable_NAME data_TYPE,其中variable_NAME是变量名,data_TYPE是PL/SQL中预定义的类型 -- 定义变量示例 -- 定义一个变长字符串 ...
doExtract:59, BooleanTypeDescriptor$2 (org.hibernate.type.descriptor.sql) extract:47, BasicExtractor (org.hibernate.type.descriptor.sql) nullSafeGet:257, AbstractStandardBasicType (org.hibernate.type) nullSafeGet:253, AbstractStandardBasicType (org.hibernate.type) ...
A SqlSmoObject object that specifies the parent that owns the Column object. name 类型:System. . :: . .String A String value that specifies the name of the column. dataType 类型:Microsoft.SqlServer.Management.Smo. . :: . .DataType A DataType object value that specifies the data type as...
String columnName= columnsResultSet.getString("COLUMN_NAME");intsqlType = columnsResultSet.getInt("DATA_TYPE");//此处拿到mysql返回的字段类型String typeName= columnsResultSet.getString("TYPE_NAME");intsize = columnsResultSet.getInt("COLUMN_SIZE");booleannullable = 1 == columnsResultSet.getInt...