"resulting_condition": "multiple equal(1, `yp_user`.`gender`)" } ] } }, { "substitute_generated_columns": { } }, { "table_dependencies": [ { "table": "`yp_user`", "row_may_be_null": false, "map_bit": 0, "depends_on_map_bits": [ ] } ] }, { "ref_optimizer_key_u...
http://dev.mysql.com/doc/refman/8.0/en/with.html.Single-TableSyntaxDELETE[LOW_PRIORITY][QUICK][IGNORE]FROMtbl_name[PARTITION (partition_name [, partition_name]...)][WHERE where_condition][ORDER BY ...][LIMIT row_count]TheDELETEstatement deletes rowsfromtbl_nameandreturnsthenumberofdeleted r...
-- 会发现并无表别名的使用 MySql 8.0版本单表delete语法如下: delete[low_priority][quick][ignore]fromtbl_name[[as]tbl_alias][partition (partition_name [, partition_name]...)][where where_condition][order by ...][limit row_count] MySql 5.7 和 8.0 多表删除格式: delete[low_priority][quick...
publicvoiddeleteRow() 例外 SQLServerException 备注 此deleteRow 方法是由 java.sql.ResultSet 接口中的 deleteRow 方法指定的。 游标位于插入行时,无法调用此方法。 使用键集游标时,此方法在结果集中留下间隙。 可以使用rowDeleted方法来测试是否有此间隙。 结果集中的行的行号不变。
DELETE[LOW_PRIORITY][QUICK][IGNORE]FROMtbl_name[PARTITION(partition_name[,partition_name]...)][WHEREwhere_condition][ORDERBY...][LIMITrow_count] 仔细对比了以下,发现了一些端倪,这里的语法并没有写出表名的别名用法,难道是使用了别名的原因?
[WHERE where_condition] 经过上面语法对比的不同发现,5.7 的单表删除确实不支持别名的使用,但是多表删除却支持(table_references里包含别名的使用)。 并且在 8.0.16 开始,单表删除已经支持使用别名了。 For consistency with the SQL standard and other RDBMS, table alias...
从SQL Server 的表或视图中删除一行或多行。 Transact-SQL 语法约定 语法 syntaxsql -- Syntax for SQL Server and Azure SQL Database[WITH<common_table_expression>[ ,...n ] ]DELETE[TOP( expression ) [PERCENT] ] [FROM] { {table_alias||rowset_function_limited[WITH(table_hint_limited[ ....
The DELETE statement in SQL can delete multiple rows by specifying a condition that matches more than one row. Example: CREATE TABLE orders (order_id INT PRIMARY KEY,customer_id INT,status VARCHAR(50));INSERT INTO orders (order_id, customer_id, status) VALUES(101, 1, 'Pending'),(102, ...
for_delete; Query OK, 3 rows affected (0.04 sec) mysql> insert for_delete (name) values ('D'); Query OK, 1 row affected (0.02 sec) mysql> select * from for_delete; +---+---+ | id | name | +---+---+ | 4 | D | +---+---+ 1 row in set (0.00 sec)截断表 trunca...
1 row in set (0.00 sec) ``` delete对SQL的影响 --- ### 未删除前的SQL执行情况 `...