For example, the following tries to insert a date value in the gender column and so it will return an error. You must specify values for the column in the order of columns defined in the table, otherwise, it will result in wrong data insertion or an error. The above statement inserted a single row, so it will return INSERT 0 1. The count is the number of rows inserted to the table. In the INSERT oid count, the oid is an object identifier which will always be 0 for the INSERT statement. No need to specify a value for that column in the INSERT statement.Įxecuting the above query in pgAdmin will display the following result:Įxecuting the INSERT INTO statement will return INSERT oid count as a result along with the query execution status like "Query returned successfully in 52 msec." in pgAdmin. ![]() If the table has a SERIAL column, Postgres will automatically generate a sequence number for the serial column. To insert a date value to the column with DATE datatype, need to specify the date in ‘YYYY-MM-DD' format. To insert character or string data, it needs to be enclosed in single quotes 'value'. If you do not specify the optional column (NULL column) then the INSERT statement will add NULL or DEFAULT value (if specified) in the table. If you do not specify the required column (NOT NULL column) in the INSERT statement, Postgres will raise an error. ![]() Column values are specified in the VALUES clause. Write * to return all columns of the inserted row(s).The above INSERT statement will insert data into all the columns of the employee table. The expression can use any column names of the table named by table_name. output_expressionĪn expression to be computed and returned by the INSERT command after each row is inserted. Refer to the SELECT statement for a description of the syntax. queryĪ query ( SELECT statement) that supplies the rows to be inserted. ![]() The corresponding column will be filled with its default value. In PostgreSQL, a table can inherit from zero or more other tables, and a query can reference either all rows of a table or all rows of a table plus all of its descendant tables. State capitals also have an extra column, state, that shows their state. expressionĪn expression or value to assign to the corresponding column. In this case, the capitals table inherits all the columns of its parent table, cities. (Inserting into only some fields of a composite column leaves the other fields null.) DEFAULT VALUESĪll columns will be filled with their default values. The column name can be qualified with a subfield name or array subscript, if needed. The name of a column in the table named by table_name. The name (optionally schema-qualified) of an existing table. In such a case both sets of with_query can be referenced within the query, but the second one takes precedence since it is more closely nested. It is possible for the query ( SELECT statement) to also contain a WITH clause. The WITH clause allows you to specify one or more subqueries that can be referenced by name in the INSERT query. If you use the query clause to insert rows from a query, you of course need to have SELECT privilege on any table or column used in the query. Use of the RETURNING clause requires SELECT privilege on all columns mentioned in RETURNING. If a column list is specified, you only need INSERT privilege on the listed columns. You must have INSERT privilege on a table in order to insert into it. The syntax of the RETURNING list is identical to that of the output list of SELECT. However, any expression using the table's columns is allowed. This is primarily useful for obtaining values that were supplied by defaults, such as a serial sequence number. The optional RETURNING clause causes INSERT to compute and return value(s) based on each row actually inserted. The target column names can be listed in any order. One can insert one or more rows specified by value expressions, or zero or more rows resulting from a query. If the expression for any column is not of the correct data type, automatic type conversion will be attempted. Description INSERT inserts new rows into a table. The values supplied by the VALUES clause or query are associated with the explicit or implicit column list left-to-right.Įach column not present in the explicit or implicit column list will be filled with a default value, either its declared default value or null if there is none. If no list of column names is given at all, the default is all the columns of the table in their declared order or the first N column names, if there are only N columns supplied by the VALUES clause or query.
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