context.Database.SqlQuery(typeof(Post), "SELECT * FROM dbo.Posts WHERE Author =@p0", userSuppliedAuthor); 或者,您还可以构造一个 DbParameter 并将它提供给 SqlQuery。 这允许您在 SQL 查询字符串中使用命名参数。 context.Database.SqlQuery(typeof(Post), "SELECT * FROM dbo.Posts WHERE Author ...
sql Type: System.String The SQL query string.parameters Type: System.Object[] The parameters to apply to the SQL query string. If output parameters are used, their values will not be available until the results have been read completely. This is due to the underlying behavior of DbData...
MY_SQL public static final DatabaseType MY_SQL Static value MySql for DatabaseType.POSTGRE_SQL public static final DatabaseType POSTGRE_SQL Static value PostgreSql for DatabaseType.SQL_AZURE public static final DatabaseType SQL_AZURE Static value SqlAzure for DatabaseType....
1、数据库类型(Database type)The following table lists the main data type. These synonyms are identified in the Microsoft word retention Jet database engine SQL. Data type BINARY storage size for each character in a byte of any type of data can be stored in the fields of this type. No ...
SQL database in Microsoft Fabric Data types can be converted in the following scenarios: When data from one object is moved to, compared with, or combined with data from another object, the data might have to be converted from the data type of one object to the data type of the other....
SQL database in Microsoft Fabric Data types can be converted in the following scenarios: When data from one object is moved to, compared with, or combined with data from another object, the data might have to be converted from the data type of one object to the data type of the other....
AlterKey(KeyRef, Boolean) Alter a table's key in SQL, either disabling or enabling it. Any alteration only pertains to the current transaction and will be reverted at the end of the current transaction. Any alteration will fail if it's called on System or non-SQL based tables...
public enumOracleTypeextends java.lang.Enum<OracleType> implements java.sql.SQLType An enumeration of types documented in Oracle Database SQL Language Reference 21c Release 1. The JDBC driver does not necessarily support every type. Since:
構文およびセマンティクスの詳細は、『Oracle Database PL/SQL言語リファレンス』を参照してください。CREATE TYPE文を使用すると、オブジェクト型、SQLJオブジェクト型、名前付きの可変配列(VARRAY)、ネストした表型または不完全なオブジェクト型の仕様部を作成できます。CREATE TYPE文およびCREATE...
database, so the interface couldn't have things like AssignableTo. If you needed that information you'd need to encode that in the driver or a third location, so what's the point of having the type constants in database/sql? They'd just be a list of names that could mean different ...