SQL Server，如何将两列合并为一列？

Question

我有一个SQL查询

SELECT TABLE_SCHEMA + TABLE_NAME AS ColumnZ 
FROM information_schema.tables

我希望结果应为table_Schema.table_name。

请帮助我!!

Answer 1

试试这个：

SELECT TABLE_SCHEMA + '.' + TABLE_NAME AS ColumnZ 
FROM information_schema.tables

Answer 2

SELECT CONCAT(TABLE_SCHEMA, '.', TABLE_NAME) AS ColumnZ FROM information_schema.tables

Answer 3

这段代码适合你试试....

SELECT Title,
FirstName,
lastName, 
ISNULL(Title,'') + ' ' + ISNULL(FirstName,'') + ' ' + ISNULL(LastName,'') as FullName 
FROM Customer

Answer 4

从SQL Server 2017开始，有CONCAT_WS运算符与分隔符连接。

SELECT CONCAT_WS('.', TABLE_SCHEMA ,TABLE_NAME) AS ColumnZ 
FROM information_schema.tables