SQL CREATETABLEdbo.Authors (idINTIDENTITY(1,1)NOTNULLPRIMARYKEY, first_nameNVARCHAR(100)NOTNULL, middle_nameNVARCHAR(100)NULL, last_nameNVARCHAR(100)NOTNULL); 此文本會Authors使用 的數據行建立id數據表,此數據行會自動產生唯一IDENTITY標識符。
Columns: Add new columns, set data types, define nullability, and specify default values. You can also designate a column as a primary key or identity column directly within the interface. Primary Key: Easily define one or more columns as the primary key for your table, ensuring each row is...
TO ([PRIMARY], FGSP1, FGSP2,FGSP3 ) GO 这里把分区函数的4个段对应到4个文件组上。 然后把表链接到分区方案,这里使用SPNO主键作为分区列。 ALTER TABLE TestSP add CONSTRAINT [PK_SPNO] PRIMARY KEY CLUSTERED (SPNo) ON TestSPScheme(SPNo) 通过上面的操作,表分区就创建好了,并且数据自动放到相应的...
ALTER TABLE db_name.tableName ADD col_name CHAR(20); 1. 2. 删除列 ALTER TABLE db_name.tableName DROP COLUMN col_name; 1. 2. 删除表 DROP TABLE db_name.tableName; 1. 3)插入数据 desc db_test.student 1. 普通插入 INSERT INTO db_name.tableName(col1, col2) VALUES(val1, val2); ...
| {ADD | DROP} ROWGUIDCOL } ] | ADD { [ <column_definition> ] | column_name AS computed_column_expression }[,...n] | [WITH CHECK | WITH NOCHECK] ADD { <table_constraint> }[,...n] | DROP { [CONSTRAINT] constraint_name ...
db.execSQL(sSQL); ... 3、MySQL 1 2 3 4 5 6 7 8 ALTERTABLE表名ADD字段1VARCHAR(100) COMMENT'注释'--添加单个字段 ALTERTABLE表名MODIFY字段VARCHAR(50);--修改字段类型 ALTERTABLE表名DROP字段;--删除字段 ALTERTABLE表名 RENAMETO表名2;--修改表名 ...
1ON PRIMARY |filegroupFile group to store the tableRemoved 2TEXTIMAGE_ON PRIMARY |filegroupFile group to store large objects of the tableRemoved CREATE FUNCTION Statement Converting Transact-SQLuser-defined functions: SQLServerMySQL 1CREATE FUNCTION | ALTER FUNCTIONnameCREATE FUNCTIONname ...
SQL database in Microsoft Fabric Specifies the properties of a PRIMARY KEY, UNIQUE, FOREIGN KEY, a CHECK constraint, or a DEFAULT definition added to a table by usingALTER TABLE. Transact-SQL syntax conventions Syntax syntaxsqlCopy [CONSTRAINTconstraint_name] { {PRIMARYKEY|UNIQUE} [CLUSTERED|NON...
-- Step4: Alter phone column add data mask USE [TestDb] GO ALTER TABLE dbo.CustomerInfo ALTER COLUMN CustomerPhone ADD MASKED WITH(FUNCTION='partial(3, "***", 4)'); 由于CustomerPhone是11位数字,我们使用partial方法打码隐藏中间四位,打码符号使用星号,保留前三位和后四位数数字即可。 查询...
The following table lists the events for the PM Recording (msdyn_pmrecording) table. Events are messages that exist so that you can subscribe to them. Unless you added the event, you shouldn't invoke the message, only subscribe to it....