Choosing the right data type for each column is key to ensuring data integrity, optimizing storage, and improving performance. Different database systems support various data types \u2014 here\u2019s a comprehensive overview for Oracle<\/strong>, MySQL<\/strong>, PostgreSQL<\/strong>, and SQL Server<\/strong>.<\/p>\n\n\n\n SQL Data Types (Oracle, MySQL, PostgreSQL, SQL Server) Choosing the right data type for each column is key to ensuring data integrity, optimizing storage, and improving performance. Different database systems support various data types \u2014 here\u2019s a comprehensive overview for Oracle, MySQL, PostgreSQL, and SQL Server. \u270d\ufe0f Why Data Types Matter \u2699\ufe0f Common SQL Data […]<\/p>\n","protected":false},"template":"","meta":{"googlesitekit_rrm_CAowu461DA:productID":""},"categories":[952,979],"class_list":["post-3902","cposts","type-cposts","status-publish","hentry","category-notes","category-sql"],"_links":{"self":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/cposts\/3902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/cposts"}],"about":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/types\/cposts"}],"wp:attachment":[{"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/media?parent=3902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/w3buddy.com\/blog\/wp-json\/wp\/v2\/categories?post=3902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}\u270d\ufe0f Why Data Types Matter<\/h2>\n\n\n\n
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\u2699\ufe0f Common SQL Data Types by DBMS<\/h2>\n\n\n\n
Type Category<\/th> Oracle<\/th> MySQL<\/th> PostgreSQL<\/th> SQL Server<\/th> Description<\/th><\/tr><\/thead> Integer<\/td> NUMBER(p)<\/code> (precision \u2264 38), BINARY_INTEGER<\/code><\/td>INT<\/code>, TINYINT<\/code>, SMALLINT<\/code>, BIGINT<\/code><\/td>INTEGER<\/code>, SMALLINT<\/code>, BIGINT<\/code><\/td>INT<\/code>, SMALLINT<\/code>, BIGINT<\/code><\/td>Whole numbers<\/td><\/tr> Decimal\/Floating<\/td> NUMBER(p,s)<\/code>, FLOAT<\/code>, BINARY_FLOAT<\/code>, BINARY_DOUBLE<\/code><\/td>DECIMAL<\/code>, FLOAT<\/code>, DOUBLE<\/code><\/td>NUMERIC<\/code>, REAL<\/code>, DOUBLE PRECISION<\/code><\/td>DECIMAL<\/code>, FLOAT<\/code>, REAL<\/code><\/td>Numbers with decimals<\/td><\/tr> String\/Text<\/td> VARCHAR2(size)<\/code>, CHAR(size)<\/code>, CLOB<\/code><\/td>VARCHAR<\/code>, TEXT<\/code>, CHAR<\/code><\/td>VARCHAR<\/code>, TEXT<\/code>, CHAR<\/code><\/td>VARCHAR<\/code>, TEXT<\/code>, CHAR<\/code><\/td>Variable\/fixed-length text<\/td><\/tr> Date & Time<\/td> DATE<\/code> (includes time), TIMESTAMP<\/code>, INTERVAL<\/code><\/td>DATE<\/code>, DATETIME<\/code>, TIMESTAMP<\/code><\/td>DATE<\/code>, TIMESTAMP<\/code><\/td>DATE<\/code>, DATETIME<\/code>, TIME<\/code><\/td>Dates and timestamps<\/td><\/tr> Boolean<\/td> No native boolean (use NUMBER(1)<\/code> or CHAR(1)<\/code> for flags)<\/td>BOOLEAN<\/code> (alias for TINYINT(1)<\/code>)<\/td>BOOLEAN<\/code><\/td>BIT<\/code><\/td>True\/False flags<\/td><\/tr> Binary<\/td> BLOB<\/code>, RAW<\/code>, LONG RAW<\/code><\/td>BLOB<\/code>, BINARY<\/code><\/td>BYTEA<\/code><\/td>VARBINARY<\/code>, BINARY<\/code><\/td>Binary data (files, images)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n \ud83e\udde9 Examples for Each DBMS<\/h2>\n\n\n\n
Oracle<\/h3>\n\n\n\n
CREATE TABLE employees (\n id NUMBER(10) PRIMARY KEY,\n name VARCHAR2(100),\n salary NUMBER(10, 2),\n hire_date DATE,\n is_active NUMBER(1) -- 0 = false, 1 = true\n);<\/code><\/code><\/pre>\n\n\n\nMySQL<\/h3>\n\n\n\n
CREATE TABLE employees (\n id INT AUTO_INCREMENT PRIMARY KEY,\n name VARCHAR(100),\n salary DECIMAL(10, 2),\n hire_date DATE,\n is_active BOOLEAN\n);<\/code><\/code><\/pre>\n\n\n\nPostgreSQL<\/h3>\n\n\n\n
CREATE TABLE employees (\n id SERIAL PRIMARY KEY,\n name VARCHAR(100),\n salary NUMERIC(10, 2),\n hire_date DATE,\n is_active BOOLEAN\n);<\/code><\/code><\/pre>\n\n\n\nSQL Server<\/h3>\n\n\n\n
CREATE TABLE employees (\n id INT IDENTITY(1,1) PRIMARY KEY,\n name VARCHAR(100),\n salary DECIMAL(10, 2),\n hire_date DATE,\n is_active BIT\n);<\/code><\/code><\/pre>\n\n\n\n\ud83d\udca1 Tips for Working with Data Types<\/h2>\n\n\n\n
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NUMBER<\/code> type is versatile \u2014 define precision and scale carefully for your needs.<\/li>\n\n\n\nVARCHAR2<\/code> in Oracle, not<\/strong> VARCHAR<\/code> (deprecated).<\/li>\n\n\n\nNUMBER(1)<\/code> or CHAR(1)<\/code> with conventions (1<\/code>\/0<\/code> or Y<\/code>\/N<\/code>).<\/li>\n\n\n\nVARCHAR2(50)<\/code> instead of VARCHAR2(4000)<\/code> if possible).<\/li>\n\n\n\nCLOB<\/code> (Oracle) or TEXT<\/code> (others) for large text fields.<\/li>\n<\/ul>\n\n\n\n\ud83e\udde0 Quick Recap<\/h2>\n\n\n\n
Data Type<\/th> Oracle Example<\/th> Purpose<\/th> Notes<\/th><\/tr><\/thead> Integer<\/td> NUMBER(10)<\/code><\/td>Whole numbers<\/td> Oracle uses flexible NUMBER<\/td><\/tr> Decimal<\/td> NUMBER(10,2)<\/code><\/td>Decimal numbers<\/td> Precision and scale specified<\/td><\/tr> String\/Text<\/td> VARCHAR2(100)<\/code><\/td>Variable-length strings<\/td> Use VARCHAR2 in Oracle<\/td><\/tr> Date & Time<\/td> DATE<\/code>, TIMESTAMP<\/code><\/td>Date and time values<\/td> Oracle DATE<\/code> includes time<\/td><\/tr>Boolean<\/td> NUMBER(1)<\/code> or CHAR(1)<\/code><\/td>True\/False flags<\/td> No native boolean in Oracle<\/td><\/tr> Binary<\/td> BLOB<\/code>, RAW<\/code><\/td>Binary data<\/td> For files, images, etc.<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"