The error “Index or primary key cannot contain Null value“, occurs when you have left the primary key (index) field empty: Every table in an Access databasemust havea primary key, and the primary key value for each recordmustbeunique. The reason you are getting this error is because t...
The "index or primary key cannot contain a null value" error typically occurs when you're trying to update a table that has a primary key or an indexed field, and you're providing a null value for that field. Here are a few steps you can take to resolve this issue: ...
Primary or unique keys cannot be subsets of dimensions (SQLSTATE 429BE). If ONnicknameis specified, UNIQUE should be specified only if the data for the index key contains unique values for every row of the data source table. The uniqueness will not be checked. ...
Primary or unique keys cannot be subsets of dimensions (SQLSTATE 429BE). If ONnicknameis specified, UNIQUE should be specified only if the data for the index key contains unique values for every row of the data source table. The uniqueness will not be checked. ...
Note:The primary key of a table is automatically indexed. You cannot index a field whose data type is OLE Object, Calculated, or Attachment. For other fields, consider indexing a field if all of the following apply: The field's data type is Short Text, Long Text, Numbe...
When you create a PRIMARY KEY constraint, a unique clustered index on the column or columns is automatically created if a clustered index on the table does not already exist and you do not specify a unique nonclustered index. The primary key column cannot allow NULL values. ...
The answer is that the put(E) methods will only assign a new key from the sequence if the primary key field is zero or null (for reference types). If an entity with a non-zero and non-null key field is passed to a put(E) method, any existing entity with that primary key value ...
name (Primary Style Name) Name Formulas Name Representation Names nary (n-ary Operator Object) naryLim (n-ary Limit Location) nc (New Cell Data) NEGBINOMDIST NETWORKDAYS next (Style For Next Paragraph) nextCondLst (Next Conditions List) NEXTIF noAutofit (No AutoFit) noBreak (No Break) no...
无论是使用 PRIMARY KEY 和 UNIQUE 约束隐式创建索引,还是使用 CREATE INDEX 显式创建索引,每个表都最多可包含 999 个非聚集索引。 对于索引视图,只能为已定义唯一聚集索引的视图创建非聚集索引。 默认值为 NONCLUSTERED。 index_name 索引的名称。索引名称在表或视图中必须唯一,但在数据库中不必唯一。索引名称必须...
table_or_view_name | schema_name.table_or_view_name | table_or_view_name } <relational_index_option> ::= { PAD_INDEX = { ON | OFF } | FILLFACTOR = fillfactor | SORT_IN_TEMPDB = { ON | OFF } | IGNORE_DUP_KEY = { ON | OFF } | STATISTICS_NORECOMPUTE = { ON | OFF } |...