Assuming the applicants table has already been created and populated. SELECT * FROM visiting_students + -+-+-+ | name | address | student_id | + -+-+-+ | Fleur Laurent | 345 Copper St, London | 777777 | + -+-+-+ | Gordon Martin | 779 Lake Ave, Oxford | 888888 | + -+-+-+ INSERT INTO students TABLE visiting_students SELECT * FROM students + -+-+-+ | name | address | student_id | + -+-+-+ | Amy Smith | 123 Park Ave, San Jose | 111111 | + -+-+-+ | Bob Brown | 456 Taylor St, Cupertino | 222222 | + -+-+-+ | Cathy Johnson | 789 Race Ave, Palo Alto | 333333 | + -+-+-+ | Dora Williams | 134 Forest Ave, Menlo Park | 444444 | + -+-+-+ | Fleur Laurent | 345 Copper St, London | 777777 | + -+-+-+ | Gordon Martin | 779 Lake Ave, Oxford | 888888 | + -+-+-+ Insert Using a FROM Statement Here are two simple examples of defining composite types: CREATE TYPE complex AS ( r double precision, i double precision. For example, a column of a table can be declared to be of a composite type. Assuming the visiting_students table has already been created and populated. PostgreSQL allows composite types to be used in many of the same ways that simple types can be used. If you create a table with a serial column then if you omit the serial column when you insert data into the table PostgreSQL will use the sequence automatically and will. If you want to insert data to some columns, then provide a list of comma-separated values after the VALUES clause. Using the DEFAULT keyword or by omitting the column from the INSERT list: INSERT INTO dataset (id, age, name, description) VALUES (DEFAULT, 42, fred, desc. If you want to insert data to all columns of a table, then specifying the list of columns is optional. SELECT * FROM persons + -+-+-+ | name | address | ssn | + -+-+-+ | Dora Williams | 134 Forest Ave, Menlo Park | 123456789 | + -+-+-+ | Eddie Davis | 245 Market St, Milpitas | 345678901 | + -+-+-+ INSERT INTO students PARTITION ( student_id = 444444 ) SELECT name, address FROM persons WHERE name = "Dora Williams" SELECT * FROM students + -+-+-+ | name | address | student_id | + -+-+-+ | Amy Smith | 123 Park Ave, San Jose | 111111 | + -+-+-+ | Bob Brown | 456 Taylor St, Cupertino | 222222 | + -+-+-+ | Cathy Johnson | 789 Race Ave, Palo Alto | 333333 | + -+-+-+ | Dora Williams | 134 Forest Ave, Menlo Park | 444444 | + -+-+-+ Insert Using a TABLE Statement Use the INSERT INTO clause with the table-name where you want to insert the data. Assuming the persons table has already been created and populated. It can be in one of following formats:Įxamples Single Row Insert Using a VALUES Clause More than one set of values can be specified to insert multiple rows.Ī query that produces the rows to be inserted. Its important to note that when using INSERT INTO BY NAME, the column names specified in the SELECT statement must match the column names in the table.Each column not present in the target list will be inserted using a default value, either its declared default value or null. The columns in the target list may be listed in any order. One can insert a single row at a time or several rows as a result of a query. Either an explicitly specified value or a NULL can be inserted.Ī comma must be used to separate each value in the clause. INSERT allows one to insert new rows into a table. Any existing rows in the target table are unaffected. For example, table1 is having columns as: id name occupation skills. Note: it does NOT work if the table has a single column which is serial.INSERT INTO table_identifier ) The INSERT INTO SELECT statement selects data from one table and inserts it into an existing table. I am trying to insert json data into text datatype of postgres table. This is available only in versions 10+, not in 9.6 and previous. If there are other, more "peculiar" default values, like a UUID function or the non-standard clock_timestamp(), the statement will have to be adjusted accordingly, like the serial case.Īn idea to improve came from the similar question: Inserting dummy data into an empty table having a primary key integer field GENERATED ALWAYS AS IDENTITY, using the OVERRIDING USER VALUE option in the INSERT statement.Using the generate_series is straight-forward: insert into course Ins cross join generate_series(1, 9) - one less than you needįor the case when there is only one column and it's a serial, I see no way to use the default. INSERT INTO TABLE1 (id, col1, col2, col3) SELECT id, 'data1', 'data2', 'data3' FROM TABLE2 WHERE cola 'something' But the expressions in the select list do not have to reference any columns in the table expression of the FROM clause they can be constant arithmetic expressions, for instance. (insert into t (i, name) - all the columns except any serial
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