代码语言:txt 复制 INSERT INTO target_table (id, column1, column2) SELECT id, column1, column2 FROM another_table ON CONFLICT (id) DO UPDATE SET column1 = EXCLUDED.column1, column2 = EXCLUDED.column2; 在上述示例中,target_table是目标表,another_table是另...
The INSERT INTO ... SELECT statement allows inserting data into a table by selecting rows from another table or query result. In this case, countries is the destination table where the data will be inserted. SELECT * FROM country_new retrieves all columns and rows from the 'country_new' t...
We can use the following syntax of the INSERT INTO SELECT statement to select and insert the data from one table to another: INSERT INTO tab_2 SELECT * FROM tab_1 WHERE cond; The name of the table in which we want to insert/paste the data is written after theINSERT INTOcommand.SELECT...
6. Inserting Data from Another Table This capability is handy when duplicating or selecting specific data from one table to insert into another. INSERT INTO ... SELECT Statement Instead of theVALUESclause, you can use aSELECTstatement to fetch records from another table and insert them. ...
CREATE TRIGGER my_trigger AFTER INSERT ON my_table BEGIN UPDATE another_table SET count = count + 1 WHERE id = 1; END; 在这个例子中,当有新的记录插入到my_table表中时,my_trigger触发器将自动更新another_table表中id为1的记录的count字段,使其值加1。 需要注意的是,触发器的使用应该谨慎,因为...
Seventh, insert another row into the inventory table: INSERT INTO inventory(product_id, quantity) VALUES(2, 200) RETURNING *; Output: product_id | quantity ---+--- 2 | 200 (1 row) Eighth, retrieve the data from the inventory_stat table: total_qty --- 300 (1 row) Summary A BEFORE...
postgres=# create table tab(id int4 primary key, val text); CREATE TABLE postgres=# insert into tab(id, val) values(1, 'val'), (3, 'val'), (4, 'val'); INSERT 0 3 postgres=# insert into tab(id, val) values(1, 'nosert'), (2, ...
fprintf(stderr,"In heap_insert,going to insert into table:%d \n\n",relation->rd_node.relNode ); */ TransactionId xid=GetCurrentTransactionId(); HeapTuple heaptup; Buffer buffer;boolall_visible_cleared =false;if(relation->rd_rel->relhasoids) ...
fprintf(stderr,"Insert into: %s\n", tmprelname.data); fprintf(stderr,"In heap_insert,going to insert into table:%d \n\n",relation->rd_node.relNode ); */ TransactionId xid=GetCurrentTransactionId(); HeapTuple heaptup; Buffer buffer;boolall_visible_cleared =false;if(relation->rd_rel-...
Feature Description Allow InsertQueryBuilder to use SELECT. The Problem Following code can't be generated using QueryBuilder INSERT INTO foo(name) SELECT "name" FROM other_table The Solution Obvious solution would be to use something lik...