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Articles by Vrundesha Joshi
Page 20 of 22
Order strings by length of characters IN mYsql?
You can order by length of characters with the help of CHAR_LENGTH() function from MySQL. The function returns the number of characters i.e. 4 for the following string −AMITTo order strings by length of characters, the following is the syntax −select *from yourTableName order by CHAR_LENGTH(yourColumnName);To understand the above concept, let us first create a table. The following is the query to create a table −mysql> create table OrderByCharacterLength −> ( −> BookName varchar(200) −> ); Query OK, 0 rows affected (1.97 sec)Insert some records in the table with the help of insert command. The query is ...
Read MoreHow to perform Increment in MySQL Update?
To update values incrementally in MySQL, you need to create a variable with the help of SET command. The syntax to create a variable is as follows −set @anyVariableName := 0;To update value, you need to use UPDATE command. Let us begin with creating a table. The query to create a table −mysql> create table UpdateValueIncrementally −> ( −> ProductId int −> ); Query OK, 0 rows affected (0.90 sec)Insert records in the table with the help of select statement. The query is as follows −mysql> insert into UpdateValueIncrementally values(10); Query ...
Read MoreProgram to Find the smallest number in an array of data in 8085 Microprocessor
In this program we will see how to find the smallest number from a block of bytes using 8085.Problem StatementWrite 8085 Assembly language program to find the smallest number from a block of bytes.DiscussionIn this program the data are stored at location 8001H onwards. The 8000H is containing the size of the block. After executing this program, it will return the smallest number and store it at location 9000H.Logic is simple, we are taking the first number at register B to start the job. In each iteration we are getting the number from memory and storing it into register A. ...
Read More8085 program to count number of once in the given 8-bit number
In this program we will see how to count number of 1's in an 8-bit number.Problem StatementWrite 8085 Assembly language program to count number of 1s in 8-bit number stored atlocation 8000H.DiscussionIn this program we areusing the rotate operation to count the number of 1's. As there are8 different bits in 8-bit number, then we are rotating the numbereight times. we can use RRC or RLC. Here we have used the RRCinstruction. This instruction sends the LSb to MSb also to carryflag. So after each iteration we can check the carry status to getthe count of 1s.If the number is ...
Read More8085 program to find 1's and 2's complement of 16-bit number
In this program we will see how to find 1's complement and 2's complement of a 16-bit number.Problem StatementWrite 8085 Assembly language program to find 1's complement and 2's complement of a16-bit number stored in 8000H and 8001H.Discussion8085 has an instruction CMA. This instruction complements the content of Accumulator. For 1's complement CMA instruction is sufficient, and for 2's complement we have to increase the number by 1 after complementing.For 16-bit number, we are taking the number into HL pair, but for complementing we have to copy the numbers to Accumulator from H and L one by one. Then by ...
Read More8085 program to find larger of two 8 bit numbers
In this program we will see how to find the larger of two numbers.Problem StatementWrite 8085 Assembly language program to find the larger number of two 8-bit number store dat location 8000H and 8001H.DiscussionThis checking is done by using the CMP instruction. This instruction is very similar to the SUB instruction. The only difference is that it does not update the value of Accumulator after executing. So after comparing, if the CY flag is set, it means that the first number is smaller, and the second one is largerInputFirst inputAddressData......8000FD800123......second inputAddressData......800059800175......Flow DiagramProgramAddressHEX CodesLabelMnemonicsCommentsF00021, 00, 80LXI H, 8000HPoint to the first ...
Read MoreHow can I select the row with the highest ID in MySQL?
You can select the row with highest ID in MySQL with the help of ORDER BY with LIMIT OFFSETThe syntax is as follows −select *from yourTableName order by yourColumnName desc limit 1 offset 0;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table HighestIdOrderBy −> ( −> EmployeeId int, −> EmployeeName varchar(200) −> ); Query OK, 0 rows affected (0.58 sec)Insert records in the table with the help of insert command. The query is as follows −mysql> insert into HighestIdOrderBy values(200, 'David'); Query OK, ...
Read More8085 program to subtract two 8-bit numbers with or without borrow
In this program we will see how to subtract two 8-bit numbers using 8085 microprocessor.Problem StatementWrite 8085 Assembly language program to subtract two 8-bit numbers with or without borrow and store the result at locations 8050H and 8051H.DiscussionIn 8085, the SUB instruction is used 2’s complemented method for subtraction. When the first operand is larger, the result will be positive. It will not enable the carry flag after completing the subtraction. When the result is negative, then the result will be in 2’s complemented form and carry flag will be enabled.We are using two numbers at location 8000H and 8001H. ...
Read MoreWhat is the SQL command to return the field names of a table?
To return the field names of a table, you can use desc command. The syntax is as follows −desc yourTableName;Or you can use column_name field from information_schema.columns table. The syntax is as follows −select column_name from information_schema.columns where table_name = ’yourTableName’;To understand both the syntax, let’s say we have a table ‘ExtractCommentDemo1’.Using the first syntax −mysql> desc ExtractCommentDemo1;The following is the output displaying the fields −+----------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+--------------+------+-----+---------+-------+ | UserId | int(11) | YES | | NULL ...
Read MoreNon-Programmable 8-Bit I/O Port
There are two types of Input Output ports. They are Programmable Input Output ports and Non-Programmable Input Output ports. Since the functions of Programmable Input Output ports changed by software they became more popular. We don't need to change the wiring rather the hardware of the I/O port to change the function. Intel 8255 is a popular Input Output chip based on port. Whereas the I/O ports which are non-programmable needs to change the wiring or the hardware to change its complete function. We will see in later that the connection needs to be changed when 8212 works like an ...
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