#MYSQL INSERT ON DUPLICATE KEY UPDATE SERIAL#
#MYSQL INSERT ON DUPLICATE KEY UPDATE UPDATE#

Writing INSERT INTO tbl2 OVERRIDING USER VALUE SELECT * FROM tbl1 will copy from tbl1 all columns that are not identity columns in tbl2 while values for the identity columns in tbl2 will be generated by the sequences associated with tbl2. This clause is useful for example when copying values between tables. If this clause is specified, then any values supplied for identity columns are ignored and the default sequence-generated values are applied. (For an identity column defined as GENERATED BY DEFAULT, OVERRIDING SYSTEM VALUE is the normal behavior and specifying it does nothing, but PostgreSQL allows it as an extension.) OVERRIDING USER VALUE If this clause is specified, then any values supplied for identity columns will override the default sequence-generated values.įor an identity column defined as GENERATED ALWAYS, it is an error to insert an explicit value (other than DEFAULT) without specifying either OVERRIDING SYSTEM VALUE or OVERRIDING USER VALUE.

#MYSQL INSERT ON DUPLICATE KEY UPDATE UPDATE#

ON CONFLICT DO UPDATE SET table_l = 1 is invalid (this follows the general behavior for UPDATE). (Inserting into only some fields of a composite column leaves the other fields null.) When referencing a column with ON CONFLICT DO UPDATE, do not include the table's name in the specification of a target column. 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. This is particularly useful when ON CONFLICT DO UPDATE targets a table named excluded, since that will otherwise be taken as the name of the special table representing the row proposed for insertion. When an alias is provided, it completely hides the actual name of the table. 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. However, ON CONFLICT DO UPDATE also requires SELECT privilege on any column whose values are read in the ON CONFLICT DO UPDATE expressions or condition. Similarly, when ON CONFLICT DO UPDATE is specified, you only need UPDATE privilege on the column(s) that are listed to be updated. If a column list is specified, you only need INSERT privilege on the listed columns. If ON CONFLICT DO UPDATE is present, UPDATE privilege on the table is also required. You must have INSERT privilege on a table in order to insert into it. WHERE clause condition was not satisfied, the row will not be returned. For example, if a row was locked but not updated because an ON CONFLICT DO UPDATE. Only rows that were successfully inserted or updated will be returned.

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.

#MYSQL INSERT ON DUPLICATE KEY UPDATE SERIAL#

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 (or updated, if an ON CONFLICT DO UPDATE clause was used). ON CONFLICT can be used to specify an alternative action to raising a unique constraint or exclusion constraint violation error. Tables with unique indexes might block if concurrent sessions perform actions that lock or modify rows matching the unique index values being inserted the details are covered in Section 64.5. INSERT into tables that lack unique indexes will not be blocked by concurrent activity. If the expression for any column is not of the correct data type, automatic type conversion will be attempted. 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. 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.

Mysql insert on duplicate key update