命名空间: Microsoft.EntityFrameworkCore.Scaffolding.Metadata 程序集: Microsoft.EntityFrameworkCore.Relational.dll 包: Microsoft.EntityFrameworkCore.Relational v9.0.0 Source: DatabaseIndex.cs 指示索引是否强制实施唯一性。 C# 复制 public virtual bool IsUnique { get; set; } 属性值 Boolean...
Create unique indexesA linked table must have a unique index to be updateable in Access. The Upsizing Wizard can upsize an existing unique index, but can't create one where none exists. If you want to be able to update your tables, make sure you ...
Index.IsUnique 属性参考 反馈 定义命名空间: Microsoft.MasterDataServices.Services.DataContracts 程序集: Microsoft.MasterDataServices.Services.Contracts.dll 指定索引是否是唯一的。 C# 复制 [System.Runtime.Serialization.DataMember(EmitDefaultValue=false, IsRequired=false)] public bool Is...
dbIndex.Name = row["INDEX_NAME"].ToString(); dbIndex.OriginalName = row["INDEX_NAME"].ToString(); // Append the index's uniqueness. dbIndex.Unique = (bool)row["UNIQUE"]; // Specify the index type. dbIndex.IndexType = (bool)row["PRIMARY_KEY"] == tru...
index. A collection of data in the columns of a table, logically arranged in ascending or descending order. A type of logical file. package. An object that contains control structures for SQL statements to be used by an application server. SQL package. Has the same meaning as the SQL term...
rawdata(= that has not been analysed) 原始资料 牛津词典 demographical/historical/personaldata 人口统计资料;史料;个人资料 牛津词典 (technical 术语)Thesedatashow that most cancers are detected as a result of clinical follow-up. 这些数据表明多数癌症是由临床随访查出的。
the first function returns. The two function names are, respectively, fn_cdc_get_all_changes_ and fn_cdc_get_net_changes_, with the capture instance name appended. Note that (like the change tracking feature) this functionality requires the table to have a primary key or other unique index...
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16014 16 No Failed to create fulltext index because key column '%.*ls' has a masking function defined on it. 16015 16 No The index on view '%.*ls' cannot be created because the view is referencing table '%.*ls' with masked columns. 16016 16 No Cannot add a masking...
Invert Index: This enables fast search for any field. 💿 Storage Models Doris supports a variety of storage models and has optimized them for different scenarios: Aggregate Key Model: able to merge the value columns with the same keys and significantly improve performance ...