SQL Server，如何將兩列合並為一列？

Question

我有一個 SQL 查詢

SELECT TABLE_SCHEMA + TABLE_NAME AS ColumnZ 
FROM information_schema.tables

我希望結果應該是table_Schema.table_name 。

請幫幫我！！

Answer 1

嘗試這個：

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

這段代碼適合你試試這個......

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

Answer 4

從 SQL Server 2017 開始，有CONCAT_WS運算符，用於連接分隔符。

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