anywhereasfen.blogg.se

Mysql syntax
Mysql syntax





mysql syntax
  1. #Mysql syntax movie
  2. #Mysql syntax code
  3. #Mysql syntax download

Getting members listing showing the year of birth The above query with a more meaningful column name SELECT Concat(`title`, ' (', `director`, ')') AS 'Concat', `year_released` FROM `movies`

  • “`alias_name`” is the alias name that we want to return in our result set as the field name.
  • “” is the optional keyword before the alias name that denotes the expression, value or field name will be returned as.
  • “SELECT ` column_name|value|expression `” is the regular SELECT statement which can be a column name, value or expression.
  • SELECT `column_name|value|expression` `alias_name` The following is the basic syntax for the column alias name We would use the column alias name to achieve that. Suppose we want to use a more descriptive field name in our result set.

    #Mysql syntax code

    The above example returned the Concatenation code as the field name for our results. Pirates of the Caribean 4 ( Rob Marshall)įorgetting Sarah Marshal (Nicholas Stoller) String portions are separated using commas in the Concat () function.Įxecuting the above script in MySQL workbench produces the following result set.

    mysql syntax

    The line “Concat (`title`, ‘ (‘, `director`, ‘)’) gets the title, adds an opening bracket followed by the name of the director then adds the closing bracket. The Concat () MySQL function is used join the columns values together. SELECT Concat(`title`, ' (', `director`, ')'), `year_released` FROM `movies`

    #Mysql syntax movie

    We also want to get the year that the movie was released. The name of the movie director should be in brackets. We want to have the movie title and the name of the movie director in one field. Let’s say we want to get a list of movie from our database. Remember in our above discussion that we mention expressions been used in SELECT statements. SELECT `full_names`,`gender`,`physical_address`, `email` FROM `members` Įxecuting the above script in MySQL workbench produces the following results. The following script would help us to achieve this. Let’s say we are only interested in getting only the full_names, gender, physical_address and email fields only. Our above query has returned all the rows and columns from the members table. SELECT * FROM `members` Įxecuting the above script in MySQL workbench produces the following results. Let’s suppose that we want to get a list of all the registered library members from our database, we would use the script shown below to do that. Table 1: members table membership_ number The Examples are performed on the following two tables

    #Mysql syntax download

    It’s not mandatory but is considered a good practice to end your statements like that.Ĭlick to download the myflix DB used for practical examples. The above statement selects all the fields from the members table. An example of a simple SELECT statement looks like the one shown below. The Star symbol is used to select all the columns in table.

  • ORDER BY is used to specify the sort order of the result set.
  • HAVING condition is used to specify criteria when working using the GROUP BY keyword.
  • GROUP BY is used to put together records that have the same field values.
  • WHERE condition is optional, it can be used to specify criteria in the result set returned from the query.
  • FROM tableName is mandatory and must contain at least one table, multiple tables must be separated using commas or joined using the JOIN keyword.
  • It is the most frequently used SQL command and has the following general syntax SELECT at least one part must be specified, “*” selected all the fields from the specified table name, fieldExpression performs some computations on the specified fields such as adding numbers or putting together two string fields into one. Select query can be used in scripting language like PHP, Ruby, or you can execute it via the command prompt. The purpose of MySQL Select is to return from the database tables, one or more rows that match a given criteria.

    mysql syntax

    Databases store data for later retrieval. SELECT QUERY is used to fetch the data from the MySQL database.







    Mysql syntax