Alias refers to the practice of using a different temporary name (usually a short name or a name with a logical meaning) to a database table or a column in a table. The main advantage of using an alias is to help make the SQL statement more concise and readable. In addition, the ...
1.为列名称好的表名称指定别名(Alias) 2.表的语法 SELECT column_name(s)FROMtable_nameAS alias_name 列的语法 SELECTcolumn_nameAS alias_nameFROM table_name
代码语言:sql 复制 SELECT * FROM ( SELECT column1 AS alias_column FROM table_name ) AS subquery_alias WHERE subquery_alias.alias_column = 'some_value'; 以下是使用CTE的示例: 代码语言:sql 复制 WITH cte_alias AS ( SELECT column1 AS alias_column FROM table_name ) SELECT * FROM cte_alias ...
@@ -188,7 +188,7 @@ public abstract class AbstractSQLConfig<T extends Object> implements SQLConfig<T TABLE_KEY_MAP.put(AllTableComment.class.getSimpleName(), AllTableComment.TABLE_NAME); TABLE_KEY_MAP.put(AllColumnComment.class.getSimpleName(), AllColumnComment.TABLE_NAME);ALLOW...
IN 操作符 IN 操作符允许我们在 WHERE 子句中规定多个值。 SQL IN 语法 SELECT column_name(s) FROM table_name WHERE column_name IN (value1,value2,...) 原始的表 (在实例中使用:) Persons 表: IN 操作符实例 现在,我们希望从上表中选取姓氏为 Adams 和 Carter 的人: ...
Describe the bug Alias of a subquery show as a Table node in Visualizes Table/Column Lineage SQL CREATE TABLE main.tab1 AS ( SELECT * FROM ( SELECT T0.* FROM (SELECT * FROM main.tab0) T0 WHERE T0.num < 100 ) ) To Reproduce Note here we r...
'VARCHAR' is not a recognized built-in function name. 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have ...
FOR TABLE table-name , view-name , nickname , 或 alias-name2 标识为其定义了 alias-name 的表,视图,昵称或表别名。 如果提供了另一个别名 (alias-name2) ,那么它不能与正在定义的新 alias-name (其标准格式) 相同。 table-name 不能是已声明的临时表 (SQLSTATE 42995)。 FOR MODULE module-name,...
Cause: java.sql.SQLSyntaxErrorException: Not unique table/alias: 'room_availability' ### The error may involve Hotel.insertUpdateRoom-Inline ### The error occurred while setting parameters ### SQL: UPDATE room_availability INNER JOIN room_availability ON list_hotel.hotel_id = room_availability....
However, the column name is changed to name in the result set. SQL AS Alias Syntax The syntax of the SQL AS command is: SELECT column_1 AS alias_1, column_2 AS alias_2, ... ...column_n AS alias_n FROM table_name; Here, column_1, column_2,...column_n are the table ...