<table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] ( column_name [ ASC | DESC ] [ ,... n ] ) [ WITH FILLFACTOR = fillfactor | WITH ( <index_option> [ ,... n ] ) ] [ ON { partition_scheme_name (partition_column...
SQL PRIMARY KEY Constraint on CREATE TABLE 下面的 SQL 在“Persons” 表创建时在 “Id_P” 列创建 PRIMARY KEY 约束: MySQL: CREATETABLEPersons(Id_PintNOTNULL,LastNamevarchar(255)NOTNULL,FirstNamevarchar(255),Addressvarchar(255),Cityvarchar(255),PRIMARYKEY(Id_P)) 1. 2. 3. 4. 5. 6. 7. ...
<table_constraint> ::= [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] ( column_name [ ASC | DESC ] [ ,... n ] ) [ WITH FILLFACTOR = fillfactor | WITH ( <index_option> [ ,... n ] ) ] [ ON { partition_scheme_name (partition_column...
设置跟踪标志 8239 时, safe_cleanup_version() 将忽略小于清理点的值,并在重新运行 sys.sp_flush_commit_table_on_demand后运行清理。 使用此跟踪标志不正确可能会导致数据损坏。 有关详细信息,请参阅 排查更改跟踪自动清理问题。 适用于: SQL Server 2022 (16.x) CU 3 及更高版本。范围:仅全局。 8284 ...
SQL UNIQUE Constraint on CREATE TABLE 下面的 SQL 在 "Persons" 表创建时在 "Id_P" 列创建 UNIQUE 约束: MySQL: CREATE TABLE Persons ( Id_P int NOT NULL, LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), ...
TABLE_NAME sysname 表名。 CONSTRAINT_TYPE varchar(11) 约束的类型: CHECK UNIQUE PRIMARY KEY FOREIGN KEY IS_DEFERRABLE varchar(2) 指定限制检查是否可延迟。始终返回 NO。 INITIALLY_DEFERRED varchar(2) 指定是否首先延迟约束检查。始终返回 NO。
bulkCopyForBatchInsertCheckConstraints 布尔值 ["真" | "假"] false(版本 12.10+)使用 useBulkCopyForBatchInsert=true 时,将此选项设置为 true 可在插入数据时启用检查约束。 将此选项设置为 false 将禁用检查约束。 有关此设置效果的详细信息,请参阅SQLServerBulkCopyOptions中的CheckConstraints选项。
COPY_INTO_FEATURE_INCOMPATIBLE_SETTING、DELTA_AMBIGUOUS_PATHS_IN_CREATE_TABLE、DELTA_CANNOT_SET_LOCATION_ON_PATH_IDENTIFIER、DELTA_CLONE_AMBIGUOUS_TARGET、DELTA_CLUSTERING_WITH_ZORDER_BY、DELTA_CLUSTER_BY_WITH_BUCKETING、DELTA_CLUSTER_BY_WITH_PARTITIONED_BY、DELTA_FILE_LIST_AND_PATTERN_STRING_CONFLICT、...
(comma-separated,default:all)--noviews ignore views--noindexes ignore indexes--noconstraints ignore constraints--nojoined don't autodetect joined table inheritance--noinflect don'ttryto convert tables names to singular form--noclasses don't generate classes,only tables--nocomments don't render ...
sys.foreign_keyscatalog view after the operation. At some point, you should check the constraints on the whole table. If the table wasn't empty before the bulk import operation, the cost of revalidating the constraint might exceed the cost of applyingCHECKandFOREIGN KEYconstraints to the ...