postgresql where string contains

The SQL input consists of a series of commands . An order consists of a series of tokens , with a semicolon (";") End. The termination of the input stream also ends a command. Which tokens are valid depends on the syntax of the particular command.A

As an off-line data analysis system, TDW has a good performance advantage in dealing with massive data by parallel computing. But Tencent knows, want to use a all-inclusive system to solve all the problems are generally unrealistic, the same, TDW

When developing Web applications, you often have to add search capabilities. I didn't even know what to search, so I drew a magnifying glass on the sketch. Search is a very important feature, so lucene based tools like Elasticsearch and SOLR become

One, the logical operator: The common logical operators are: and, or and not. The semantics are exactly the same as the logical operators in other programming languages. Second, the comparison operator: The following is a list of comparison

  PostgreSQL is a very advanced object-relational database management system (ordbms). Currently, it has the most powerful features and the most advanced free software database system. Some features are not even available in commercial databases.

Document directory 9.2.2. Case sensitivity of the identifier From: http://bbs.chinaunix.net/viewthread.php? Tid = 812899   This problem is lost because I just got started with pgsql. PostgreSQL is case-sensitive and converts the database object

The PartialIndex of MySQLInnoDB is: bytes, typicallythefirstNcharacters (theprefix) ofalongVARCHARvalue. The PartialIndexes of PostgreSQL is: Apartialindexisanindexbuiltove The Partial Index of MySQL InnoDB is: An index that represents only part of

A Brief Introduction to Ruby on Rails's support for PostgreSQL array types, railspostgresql I am very happy to announce that Rails 4.0 now supports PostgreSQL array types. you can easily create fields of the array type through: array => true in

4.2. Value expressionsValue expressions are used in a variety of syntax environments, such as in the target list of the SELECT command, as new column values in INSERT or UPDATE , or in search conditions for many commands. We sometimes call the

First, server process startup and shutdown: The following is the use of the PG_CTL command and the common options, and it should be noted that the command is a wrapper for the Postgres command, so it is more convenient to use than the direct use of