1.语法:ALTER TABLE 表名 ADD CONSTRAINT 主键名 PRIMARY KEY 表名(主键字段); 3.添加外键 1.语法:ALTER TABLE 表名 ADD CONNSTRAINT 外键名 FOREIGN KEY(外键字段) REFERENCES 关联表名(关联字段); 4.插入单(多)条数据记录(和SQL Server相同,但是不能用select多列添加数据) 1.INSERT INTO 表名[(字段名...
Here,table_nameis the name of the table to which you want to add the primary key.column1, column2, ...are the names of the columns that you want to use as the primary key. You can specify multiple columns separated by commas to create a composite primary key. Example: Adding a Pri...
ALTER TABLE modifies a table definition by altering, adding, or dropping columns and constraints. ALTER TABLE also reassigns and rebuilds partitions, or disables and enables constraints and triggers.
9 SQL問合せおよび副問合せ 10 SQL文: ADMINISTER KEY MANAGEMENTからALTER JAVA 11 SQL文: ALTER LIBRARYからALTER SESSION 12 SQL文: ALTER SYNONYMからCOMMENT ALTER SYNONYM ALTER SYSTEM ALTER TABLE ALTER TABLESPACE ALTER TABLESPACE SET ALTER TRIGGER ALTER TYPE ALTER USER ALTER VIEW ANALYZE ASSOCIATE ...
当database_name是当前数据库或database_name并且table_or_view_nametempdb以#开头时,SQL 数据库支持由三部分构成的名称格式<database_name>.[schema_name].<table_or_view_name>。REBUILD [ WITH ( <rebuild_index_option> [ ,... n ] ] ]适用于:SQL Server 2012 (11.x) 及更高版本和 Azure SQL ...
KB4013116 - FIX: ALTER TABLE, ADD CONSTRAINT, and PRIMARY KEY statements do not detect a duplicate key in SQL Server 2016Applies ToSQL Server 2016 Enterprise Core - duplicate (do not use) SQL Server 2016 Enterprise - duplicate (do not use) SQL Server 2016 Developer - duplicate (do not ...
SQL 資料庫 指定使用ALTER TABLE所建立之條件約束定義中的索引所能套用的一組選項。 如需索引選項的完整描述,請參閱CREATE INDEX。 Transact-SQL 語法慣例 語法 syntaxsql複製 {PAD_INDEX= {ON|OFF} |FILLFACTOR= fillfactor |IGNORE_DUP_KEY= {ON|OFF} |STATISTICS_NORECOMPUTE= {ON|OFF} |ALLOW_ROW_LOCKS=...
For more information, see Section 13.1.18, “CREATE TABLE Statement”. The word COLUMN is optional and can be omitted. Multiple ADD, ALTER, DROP, and CHANGE clauses are permitted in a single ALTER TABLE statement, separated by commas. This is a MySQL extension to standard SQL, which ...
To enable a UNIQUE or PRIMARY KEY constraint, you must have the privileges necessary to create an index on the table. You need these privileges because Oracle creates an index on the columns of the unique or primary key in the schema containing the table. To enable or disable triggers, ...
syntaxsql 複製 ALTER INDEX { index_name | ALL } ON [ schema_name. ] table_name { REBUILD { [ PARTITION = ALL [ WITH ( <rebuild_index_option> ) ] ] | [ PARTITION = partition_number [ WITH ( <single_partition_rebuild_index_option> ) ] ] } | DISABLE | REORGANIZE [ PARTITION ...