![]() ![]() In this manuscript, the Syrian priest represents Muhammad as a "false prophet," and an " Antichrist". Īmong the first sources representing Muhammad is the polemical work "Concerning Heresy" (Perì hairéseōn) of John of Damascus, translated from Greek into Latin. John claimed that an Arian monk (whom he did not know was Bahira) influenced Muhammad and the writer viewed the Islamic doctrines as nothing more than a hodgepodge culled from the Bible. The second chapter of his book, The Fount of Wisdom, titled "Concerning Heresies", presents a series of discussions between Christians and Muslims. 676–749 AD), who was familiar with Islam and Arabic. One Christian who came under the early dominion of the Islamic Caliphate was John of Damascus (c. In early Christian criticism, it was claimed that Bahira was a heretical monk whose errant views inspired the Qur'an. Muhammed and the Monk Sergius (Bahira), 1508, by Dutch artist Lucas van Leyden.
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![]() ![]() Now, the CUSTOMERS table is changed and following would be the output from the SELECT statement. ![]() | 7 | Muffy | 24 | Indore | 10000.00 | NULL |įollowing is the example to DROP sex column from the existing table. Second, you put the new column and its definition. | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | NULL | Introduction to MySQL ADD COLUMN statement First, you specify the table name after the ALTER TABLE clause. ![]() | ID | NAME | AGE | ADDRESS | SALARY | SEX | Now, the CUSTOMERS table is changed and following would be output from the SELECT statement. | 1 | Ramesh | 32 | Ahmedabad | 2000.00 |įollowing is the example to ADD a New Column to an existing table − A column set cant be added to a table that already contains sparse columns. The following examples show adding a column to table T2. ALTER TABLE T1 ALTER COLUMN C4 DROP SPARSE GO I. The basic syntax of an ALTER TABLE command to DROP PRIMARY KEY constraint from a table is as follows.Ĭonsider the CUSTOMERS table having the following records − ALTER TABLE T1 ALTER COLUMN C4 ADD SPARSE GO To convert the C4 sparse column to a nonsparse column, execute the following statement. If you're using MySQL, the code is as follows − The basic syntax of an ALTER TABLE command to DROP CONSTRAINT from a table is as follows. The basic syntax of an ALTER TABLE command to ADD PRIMARY KEY constraint to a table is as follows.ĪDD CONSTRAINT MyPrimaryKey PRIMARY KEY (column1, column2.) The basic syntax of an ALTER TABLE command to ADD CHECK CONSTRAINT to a table is as follows.ĪDD CONSTRAINT MyUniqueConstraint CHECK (CONDITION) The basic syntax of ALTER TABLE to ADD UNIQUE CONSTRAINT to a table is as follows.ĪDD CONSTRAINT MyUniqueConstraint UNIQUE(column1, column2.) The basic syntax of an ALTER TABLE command to add a NOT NULL constraint to a column in a table is as follows.ĪLTER TABLE table_name MODIFY column_name datatype NOT NULL The basic syntax of an ALTER TABLE command to change the DATA TYPE of a column in a table is as follows.ĪLTER TABLE table_name MODIFY COLUMN column_name datatype In the above Syntax Alter is the command or sql statement ,table is the keyword and tablename is the name of the existing table in sql server database which you wish to make modification. The basic syntax of an ALTER TABLE command to DROP COLUMN in an existing table is as follows.ĪLTER TABLE table_name DROP COLUMN column_name The ALTER TABLE statement allows user to modify an existing table such as to add, modify or drop a column from an existing table. The basic syntax of an ALTER TABLE command to add a New Column in an existing table is as follows.ĪLTER TABLE table_name ADD column_name datatype You should also use the ALTER TABLE command to add and drop various constraints on an existing table. On the other hand, there is no provision in the syntax graph for multiple ADD.The SQL ALTER TABLE command is used to add, delete or modify columns in an existing table. However, we can see ADD is followed by a suite of definitions separated by comma. There are a lot of things, so it's a bit difficult to see the forest for the trees. ![]() This is the relevant syntax graph from Books Online: ALTER TABLE. That is, the problem is with the second colunm. In this case the message reads: Msg 102, Level 15, State 1, Line 3 It also a good idea to read the entire error message. Whenever you get a syntax error, it is always a good idea to use Books Online to look up the syntax graph to see what you did wrong. ![]() |
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