英文:
How To Get The Distinct Values From 2 columns Into 1
问题
使用表table1中的数值，我该如何获取这两列的不同值并将它们用于在新表中创建一个新列？
附上了输入数值的示例表格和期望的输出。
我正在使用Snowflake数据库。
英文:
Say I have a table, table1.
And table1 has 2 columns, "Vegetables" and "Fruits"
Using the values from table 1, how can I get the distinct of these 2 columns and use them to create a new column in a new table?
Attached is a sample table of input values, and expected output
I am using snowflake.
答案1
得分: 1
像这样吗？
CREATE TABLE table2 (
id INT PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(255)
);
INSERT INTO table2 (name)
SELECT name FROM (
SELECT vegetables AS name FROM table1
UNION
SELECT fruits AS name FROM table1
) AS names
GROUP BY name;
查看这个链接 --> sqlfiddle
英文:
Something like this?
CREATE TABLE table2 (
id INT PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(255)
);
INSERT INTO table2 (name)
SELECT name FROM (
SELECT vegetables AS name FROM table1
UNION
SELECT fruits AS name FROM table1
) AS names
GROUP BY name;
Check this out --> sqlfiddle
答案2
得分: 1
SELECT DISTINCT column_name FROM
(
SELECT fruits AS column_name FROM table1
UNION
SELECT vegetables AS column_name FROM table2
) AS distinct_values;
英文:
SELECT DISTINCT column_name FROM
(
SELECT fruits AS column_name FROM table1
UNION
SELECT vegetables AS column_name FROM table2
) AS distinct_values;
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