检查INSERT语句的语法格式; 确认插入的数据值与表结构的匹配性; 验证是否存在因事务设置造成的阻塞; 查阅相关文档以确认SQL Server版本的差异性。 在技术原理角度,SQL Server中的INSERT语句的基本格式为: INSERT INTO \text{table_name} \text{(columns)} \text{VALUES (values)} 如果未严格遵循上述格式,便会导致...
To insert a row into a table, you need to specify three things: First, the table, which you want to insert a new row, in theINSERT INTOclause. Second, a comma-separated list of columns in the table surrounded by parentheses. Third, a comma-separated list of values surrounded by parenth...
Inserting Values into User-Defined Type Columns You can insert values in user-defined type columns by: Supplying a value of the user-defined type. Supplying a value in a SQL Server system data type, as long as the user-defined type supports implicit or explicit conversion from that type. Th...
In case you insert data into multiple columns, but only some columns need to import from the table_b, some columns need to import from another set of data: INSERT INTO table_a (col1a, col2a, col3a, col4a …) SELECT table_b.col1b, 'other value', table_b.col3b, 'another_va...
INSERT INTO [<columnstore index>] SELECT col1 /* include actual list of columns in place of col1*/ FROM [<Staging Table>] 此命令會以類似於 bcp 或大量插入的方式,將資料以單一批次載入至資料行存放區索引。 如果暫存表中的資料列數量 < 102400,則資料列會載入至差異資料列群組,否則會直接載...
使用INSERT INTO...SELECT 以最低限度記錄和平行處理原則來大量匯入資料您可以搭配使用 INSERT INTO <target_table> SELECT <columns> FROM 最低限度記錄,有效率地將大量資料列從某份資料表 (例如暫存表格) 傳送至另一份資料表。 最低限度記錄可以改善此陳述式的效能並且降低交易期間作業填滿可用交易記錄空間的可能...
使用ADD 语句向已有表中增加 columns, constraints,watermark。 向表新增列时可通过 FIRST or AFTER col_name 指定位置,不指定位置时默认追加在最后。 ADD 语句示例如下。 -- add a new column ALTER TABLE MyTable ADD category_id STRING COMMENT 'identifier of the category'; -- add columns, constraint, ...
USEAdventureWorks2022; GOCREATETABLEdbo.MyProducts (NameVARCHAR(50), ListPrice MONEY); GO-- This statement fails because the third values list contains multiple columns in the subquery.INSERTINTOdbo.MyProducts (Name, ListPrice)VALUES('Helmet',25.50), ('Wheel',30.00), (SELECTName, ListPriceFROM...
报错:Update row with Key (id)=(xxxx) multiple times或者duplicate key value violates unique constraint 问题原因:违反唯一性约束,执行UPDATE、INSERT ON CONFLICT或INSERT操作时,主键存在重复数据。 解决方法: 若INSERT语法报错:可以改为INSERT INTO xx ON CONFLICT的语法,实现主键去重,详情请参见INSERT ON CONFLIC...
Specifies a set of columns that are included, along with the columns oftable-nameorview-name, in the result table of the INSERT statement when it is nested in the FROM clause of the outer fullselect that is used in a subselect, a SELECT statement, or in a SELECT INTO statement. The in...