Table1

id	Name
1	xxx
2	ooo

Table2

Table1Id	Table1Name	Column1	Column2	Column3
1	sss	xxxx	xxxx	xxxx
2	ddd	xxxx	xxxx	xxxx
2	ddd	xxxx	xxxx	xxxx

?

更新Table1的Name到Table2

/** Update t2* Set t2.Table1Name = t1.Name* From Table2 t2* Join Table1 t1 on t1.Id = t2.Table1Id* Where t1.Name <> t2.Table1Name*/ // 兩個table沒有創建foreign key, 需要先create custom relation EntityRelation entityRelation = new EntityRelation(Table1Fields.Id, Table2Fields.Table1Id, RelationType.OneToMany);IRelationCollection relation = new RelationCollection(); relation.Add(entityRelation, JoinHint.Inner);IPredicateExpression filter = new PredicateExpression(); filter.Add(Table2Fields.Table1Name != Table1Fields.Name);Table2Entity updater = new Table2Entity(); updater.Fields[(int)Table2FieldIndex.Table1Name].ExpressionToApply = new Expression(Table1Fields.Name);Table2Collection updatedCollection = new Table2Collection(); updatedCollection.UpdateMulti(updater, filter, relation);

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轉載于:https://www.cnblogs.com/sipher/p/11262179.html

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