1、造一行常量數據SQL
select "col1","col2","col3"
運行結果 ：
2、造多行常量數據SQL
2.1 最直接的簡單寫法（只最后一列加別名）
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "XXXXX") ,
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}') AS value
UNION
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "YYYYY") ,
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}') AS value
運行結果 ：
2.2 最直接的簡單寫法（每一列加別名）
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "XXXXX") AS KEY,
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}') AS value
UNION
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "YYYYY") AS KEY,
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}') AS value
UNION
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "ZZZZZ") AS KEY,
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}') AS value
運行結果 ：
2.3 最笨的寫法
SELECT
*
FROM
(
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "XXXXX"),
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}')
)
aa
UNION
SELECT
*
FROM
(
SELECT
concat('AAA', ':', "BBB", '_PP', ':', "YYYYY"),
concat('{"Id":"', "12323213", '","url":"', "http://helloworld.com/hello.html", '","code":"', "hello", '"}')
)
bb
運行結果：
備注：
1、在造多行數據時，若用前兩種，在最后一列經測試需要加別名，否則提示語法錯誤
類似：FAILED: ParseException line 7:0 missing EOF at 'SELECT' near 'UNION'