HANA Basic SQL 01_SAP刘梦_新浪博客

Basic SQL

目录

Basic SQL    1

1、Create    1

2、Insert data    5

3、Update data    6

4、Delete data    7

5、Drop    7

6、Where：Simple select with like and between and so on    8

7、Let use function max count sum avg round    9

8、Group by    10

9、Join    13

10、UNIONS    14

11、Filter data by having    16

12、SUB-SELECTS    17

13、Array data    20

1、Create

You can check the created SQL for a table

You can create a table refer other table

Such as

The data will insert into new table automatic

If you don't want data, you can use truncate to delete all data

truncate table "HANA04"."TEST_DB_01"

You can also delete data manually

You can create view by the same way
create view v_test001
as ( select * from "HANA04"."EMPFACT1" )
 
CREATE VIEW "HANA04"."MY_VIEW01"
( "NAME",
"SDATE",
"SAL_AMT" )
AS SELECT
AS NAME,
AS SDATE,
AS SAL_AMT
FROM "HANA04"."EMPFACT1",
"HANA04"."EMPFACT2"
WHERE "HANA04"."EMPFACT1"."EMPID" = "HANA04"."EMPFACT2"."EMPID"
WITH READ ONLY

Or

2、Insert data

3、Update data

update "HANA04"."EMPFACT1"
set sal = 888
where empid = 'CC1'

4、Delete data

delete from "HANA04"."EMPFACT1" where empid = 'AA1'

Delete table data
truncate table "HANA04"."TEST_DB_01"

5、Drop

delete table or view
drop table "HANA04"."TEST_DB_01"
drop table "HANA04"."TEST_DB_01" Restrict
drop table "HANA04"."TEST_DB_01" cascade
Restrict: ensures that only tables that do not have relevant views and integrity constraints can be deleted.
cascade: any relevant views and integrity constraints are deleted.
restrict: 确保只有不存在相关视图和 完整性约束的表才能删除
 cascade: 任何相关视图和完整性约束一并被删除

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