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); Insert data. 1 2 3 INSERT INTO student1 VALUES(1,1); INSERT INTO student1 VALUES(2,2); INSERT INTO student1 VALUES(3,3); View data. 1 SELECT * FROM student1; Update the values of all records. 1 UPDATE student1 SET classno = classno*2; View data. 1 SELECT * FROM student1; Delete
); Insert data. 1 2 3 INSERT INTO student1 VALUES(1,1); INSERT INTO student1 VALUES(2,2); INSERT INTO student1 VALUES(3,3); View data. 1 SELECT * FROM student1; Update the values of all records. 1 UPDATE student1 SET classno = classno*2; View data. 1 SELECT * FROM student1; Delete
Data Studio allows you to reset counters in the following pages: Display DDL User/Role, Batch Delete, Result Set, and Execution Plan. Data Studio displays an error message indicating that no result is found in the status bar.
(anyarray) RETURNS SETOF anyelement AS $$ SELECT $1[i][j] FROM generate_subscripts($1,1) g1(i), generate_subscripts($1,2) g2(j); $$ LANGUAGE sql IMMUTABLE; SELECT * FROM unnest2(ARRAY[[1,2],[3,4]]); unnest2 --------- 1 2 3 4 (4 rows) -- Delete
Data Studio allows you to reset counters in the following pages: Display DDL User/Role, Batch Delete, Result Set, and Execution Plan. Data Studio displays an error message indicating that no result is found in the status bar.
= 'play gym' WHEN NOT MATCHED THEN INSERT VALUES (np.product_id, np.product_name, np.category) WHERE np.category = 'books'; Query updates: 1 SELECT * FROM products ORDER BY product_id; Delete a table: 1 2 DROP TABLE products; DROP TABLE newproducts; Parent topic: DML Syntax
attribute_name [ CASCADE | RESTRICT ] ALTER ATTRIBUTE attribute_name [ SET DATA ] TYPE data_type [ COLLATE collation ] [ CASCADE | RESTRICT ] Add a new attribute to a composite type. 1 ALTER TYPE name ADD ATTRIBUTE attribute_name data_type [ COLLATE collation ] [ CASCADE | RESTRICT ] Delete
You can check it in the snapshot list and manually delete it if it is no longer necessary. During the change, the cluster is read-only, affecting intelligent O&M tasks. You are advised to start these tasks after the change or pause them before the change.
After a cluster is converted into a logical cluster, you can create, modify, or delete a resource pool in the logical cluster. This feature is supported only by clusters of version 8.0 or later. Resources cannot be managed during offline scale-out.
After the separation of duties is enabled, only the system administrator has the permission to create, modify, delete, and allocate logical clusters. Accessing a logical cluster requires permissions.
BEGIN INSERT INTO db(a,b) VALUES (key, data); RETURN; EXCEPTION WHEN unique_violation THEN -- Loop to try the UPDATE again: END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, 'david'); SELECT merge_db(1, 'dennis'); -- Delete
BEGIN INSERT INTO db(a,b) VALUES (key, data); RETURN; EXCEPTION WHEN unique_violation THEN -- Loop to try the UPDATE again: END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, 'david'); SELECT merge_db(1, 'dennis'); -- Delete
BEGIN INSERT INTO db(a,b) VALUES (key, data); RETURN; EXCEPTION WHEN unique_violation THEN -- Loop to try the UPDATE again: END; END LOOP; END; $$ LANGUAGE plpgsql; SELECT merge_db(1, 'david'); SELECT merge_db(1, 'dennis'); -- Delete
Delete the tables created before. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 DROP TABLE store_sales; DROP TABLE date_dim; DROP TABLE store; DROP TABLE item; DROP TABLE time_dim; DROP TABLE promotion; DROP TABLE customer_demographics; DROP TABLE customer_address
In this way, when any two of the DELTAMERGE, UPDATE, and DELETE operations are concurrently performed, an operation can be performed only after the previous one is complete.
In this way, when any two of the DELTAMERGE, UPDATE, and DELETE operations are concurrently performed, an operation can be performed only after the previous one is complete.
The with_query detailed format is as follows: with_query_name [ ( column_name [, ...] ) ] AS ( {select | values | insert | update | delete} ) with_query_name specifies the name of the result set generated by a subquery.
Value range: enumerated values origin indicates that the system copies operations such as insert, delete, and update from the current session. replica indicates that the system copies operations such as insert, delete, and update from other places to the current session. local indicates
Delete such an index. Do not create unnecessary secondary indexes. Useful secondary indexes can accelerate query. However, the space occupied by indexes increases with the number of indexes.
the target table: 1 DROP TABLE product_info; If the following output is displayed, the foreign table has been deleted: DROP TABLE Run the following statement to delete the foreign table: 1 DROP FOREIGN TABLE product_info_ext; If the following output is displayed, the foreign table